Details of a Researcher - KONISHI, Tsuyoshi

写真a

KONISHI, Tsuyoshi

Scopus Paper Info

Paper Count: 202 Citation Count: 1469 h-index: 18

Click to view the Scopus page. The data was downloaded from Scopus API in September 22, 2025, via http://api.elsevier.com and http://www.scopus.com .

Affiliation

Faculty of Science and Engineering, School of Fundamental Science and Engineering

Job title

Professor

Degree

博士（工学） ( 1995.12 Osaka University )

Homepage URL

https://www.eps.sci.waseda.ac.jp/staff/konishi/

Research Experience

2024.04

-

Now

Waseda University Faculty of Science and Engineering Professor
2020.04

-

2024.03

Osaka University Graduate School of Engineering . Associate Professor
2007.04

-

2024.03

Osaka University Center for Advanced Science and Innovation Associate Professor
2016.11

-

2020.10

総務省戦略的情報通信研究開発推進事業評価委員
2007.04

-

2020.03

Osaka University Graduate School of Engineering Division of Science and Biotechnology Associate Professor
2017.06

-

2017.09

愛媛大学工学部非常勤講師
2011.04

-

2017.03

Osaka University Office for University-Industry Collaboration
2009.04

-

2010.03

フランス共和国 Institut d'Optique (CNRS)・Visiting Professor
2008.07

-

2008.09

Visiting Professor
2007.10

-

2008.03

京都大学大学院工学研究科非常勤講師
2005.04

-

2007.03

Osaka University Graduate School of Engineering Division of Science and Biotechnology Associate Professor
2002.10

-

2007.03

大阪大学助教授
2002.10

-

2005.03

Osaka University Graduate School of Engineering Associate Professor
1998.04

-

2002.09

Osaka University Graduate School of Engineering Research Assistant
1996.01

-

2002.09

大阪大学助手

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Education Background

1993.03

-

1995.12

Osaka University Graduate School, Division of Engineering
1991.04

-

1993.03

Osaka University Graduate School of Engineering Department of Applied Physics
1987.04

-

1991.03

Osaka University Faculty of Engineering

Committee Memberships

2024.04

-

Now

独立行政法人大学改革支援・学位授与機構学位審査会専門委員
2019.04

-

Now

電子情報通信学会超高速光エレクトロニクス研究会専門委員
2010.04

-

Now

日本光学会次世代フォトニックネットワークのための光技術研究グループ代表幹事
2020.04

-

2024.03

日本光学会関西支部幹事
2020.04

-

2024.01

IEEE Photonics Society Kansai Chapter Chair
2018.10

-

2021.09

総務省国際戦略局技術政策課戦略的情報通信研究開発事業評価委員
2019.09

-

2020.03

電子情報通信学会通信ソサイエティ編集委員
2016.04

-

2020.03

日本学術振興会産学協力研究委員会フォトニクス情報システム第179委員会運営委員
2019.01

-

2020.01

IEEE Photonics Society Kansai Chapter Vice chair
2017.04

-

2019.03

電子情報通信学会超高速光エレクトロニクス研究会専門委員（部会主査）
2014.04

-

2019.03

情報通信研究機構高度通信・放送研究開発委託研究評価委員会専門委員
2014.12

-

2017.03

応用物理学会フォトニクス分科会幹事
2014.04

-

2016.03

レーザー学会産業賞選考委員会幹事
2006.06

-

2016.03

日本学術振興会産学協力研究委員会フォトニクス情報システム第179委員会庶務幹事
2008.04

-

2009.03

応用物理学会関西支部幹事
2005.04

-

2009.03

電子情報通信学会超高速光エレクトロニクス研究会専門委員
2007.04

-

2008.03

応用物理学会関西支部支部長付き幹事，2007年04月～ 2008年03月
2005.04

-

2007.03

応用物理学会分科会日本光学会幹事
2004.04

-

2007.03

応用物理学会分科会日本光学会次世代フォトニックネットワークのための光技術研究グループ代表幹事
2004.10

-

2006.03

学術振興会先導的研究開発委員会庶務幹事
2003

-

　

電子情報通信学会フォトニックネットワーク研究会専門委員

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Professional Memberships

　

　

　

電気情報通信学会フォトニックネットワーク研究会
　

　

　

IEEE
　

　

　

米国光学会
　

　

　

日本光学会
　

　

　

応用物理学会
　

　

　

電子情報通信学会超高速光エレクトロニクス研究会
　

　

　

応用物理学会フォトニクス分科会
　

　

　

電子情報通信学会通信ソサイエティ「フォトニックネットワーク」研究会
　

　

　

日本光学会「次世代フォトニックネットワークのための光技術」研究グループ
　

　

　

電子情報通信学会
　

　

　

The Institute of Electrical and Electronics Engineers (IEEE)
　

　

　

The Optical Society of America

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Research Areas

Biofunction and bioprocess engineering / Communication and network engineering / Information network 光信号処理/フォトニックA/D変換 / Measurement engineering IoT用超高速光波形モニタリング / Optical engineering and photon science シリコンフォトニクス、ナノ光デバイス

Research Interests

超高速光学
光信号処理
光デバイス（シリコンフォトニクス）
計測工学
光工学および光量子科学
情報通信工学
応用光学

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Awards

大阪大学賞

2023.11 大阪大学教育貢献部門
電子情報通信学会通信ソサイエティ活動功労賞

2020.09 電子情報通信学会

Winner：小西毅
IEEE 関西支部メダル

2020.02 IEEE関西支部

Winner：小西毅
Senior Member (IEEE)

2019.08 IEEE

Winner： Tsuyoshi KONISHI
Optoelectronics and Communications Conference/International Conference on Photonics in Switching 2019 (OECC/PSC 2019) BEST STUDENT AWARD

2019.07 IEEE.,IEICE

Winner： Y. Kaihori
大阪大学総長顕彰（研究部門）

2014.07 大阪大学

Winner：小西毅
IEEE CLEO-PR & OECC/PS 2013 Best Paper Award

2013.07 IEEE (The Institute of Electrical and Electronics Engineers, Inc.)

Winner： T. Satoh, T. Nagashima, K. Itoh, T. Konishi
Senior Member (Optical Society of America)

2010.05 Optical Society of America

Winner： Tsuyoshi KONISHI
平成19年度VBL部門ならびに共同研究部門公開成果発表会成果発表グランプリ最優秀賞受賞

2008.03 大阪大学先端科学イノベーションセンターVBL部門

Winner：小西毅, 後藤洋臣, 加藤卓也, 米谷勇輝, 西谷隆志, 伊東一良
平成17年度レーザー学会第25回年次大会優秀論文発表賞

2006.01 レーザー学会

Winner：中川照隆, 小西毅, 伊東一良
平成１６年度応用物理学会光学論文賞

2005.03 （社）応用物理学会

Winner：小西毅

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Media Coverage

分光器で食品分析阪大、機械学習活用

Internet

機械学習ニュースヘッドライン

2020.08
分光器で食品分析高精度・低コスト阪大機械学習活用

Newspaper, magazine

Author： Other

科学新聞

2020.08
阪大，市販装置で高精度食品分光分析に成功

Internet

OPTRONICS ONLINE

2020.08
分光器で食品分析阪大、機械学習活用

Newspaper, magazine

Author： Other

日刊工業新聞

2020.08
機械学習により⾷品分析の低コスト化を実現⾼精度は維持阪⼤

Internet

Author： Other

財経新聞 BIGLOBEニュース、FOOCOM.NET、エンタメプラス、livedoorニュース

2020.08
機械学習で実現。市販の機器で高精度食品分析を可能に。 ―IoT 時代のビッグデータを低コストで分析できる技術―

Other

Author： Myself

大阪大学プレスリリース、記者発表、大阪大学工学研究科HP（トップ）

2020.07
New sensing method could provide IoT technology at low price

New Electronics UK

2018.06

　View Summary

Scientists at Osaka University say they have discovered a new, super spectral resolution method for multi-channel spectrometers to conventional interrogators for optical fibre sensing – a market which is expected to reach more than $300million in the next few years.
A Fresh Sensation In Sensing Technology

Electronic Component News USA

2018.06

　View Summary

Scientists at Osaka University introduced a new super spectral resolution method for multi-channel spectrometers to conventional interrogators for optical fiber sensing. As a result, they performed optical fiber temperature sensing on the sub-nanometer scale with less-expensive spectrometers.
A Fresh Sensation In Sensing Technology

Phys.org USA

2018.06

　View Summary

Use of this technology will allow for high-speed, real-time optical fiber temperature sensing at performance levels typical in conventional devices at a low price. This will promote applications of this technology in a wide range of fields, including temperature sensing and strain sensing, which have attracted attention as IoT technologies," lead author Tsuyoshi Konishi said.
New sensing method could provide IoT technology at low price

TechRistic.com USA

2018.06

　View Summary

Scientists at Osaka University say they have discovered a new, super spectral resolution method for multi-channel spectrometers to conventional interrogators for optical fibre sensing – a market which is expected to reach more than $ 300million in the next few years.
A fresh sensation in sensing technology

Livescience.tech

2018.06

　View Summary

Scientists at Osaka University presented a brand-new very spectral resolution technique for multi-channel spectrometers to standard interrogators for fiber opticssensing As an outcome, they carried out fiber optics temperature level sensing on the sub-nanometer scale with less-expensive spectrometers.
IoTセンシングを安価に，阪大が新技術実証

科学新聞

2018.06

　View Summary

IoTのための光ファイバアセンシング（温度センシング）に関するデモンストレーションの成果に関する記事
阪大，ファイバ温度センサの高性能化／低価格化に成功

OPTORONICSオンライン

2018.05
IoTセンシングを安価に提供できる新技術を実証！ ―温度や歪センシングまで幅広い分野での産業促進に期待―

大阪大学プレスリリース

2018.05
1兆分の1秒の超高速光現象を簡単に計測できる技術を実現

大阪大学工学研究科HP（トップ）

2017.07
アナログからデジタル変換光技術で実現

日刊工業新聞

2015.06
“デジタルに高速変換阪大”

日経産業新聞

2015.05
“光パルスの形状計測阪大が装置大容量通信を円滑化”

日刊工業新聞

2015.04
“パルス光の質簡単検査通信やレーザー持ち運べる装置阪大などが開発”

日経産業新聞

2015.04
通信速度2倍に変換技術改良

日本経済新聞

2013.07

　View Summary

2013年07月02日 16面
千兆分の１秒台とらえる

日刊工業新聞

2004.01

　View Summary

フェムト秒で起こる現象を計測可能な超高速光スペクトログラムスコープを開発した。
一秒間で映画１０００本送信

毎日新聞

2002.11

　View Summary

大阪大学を中心とした研究グループが，２次元画像を超高速にフェムト秒光パルスに変換する技術の基本原理の確認に成功した．

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Papers

Light Path Modeling Based on Data Assimilation Using Changes in a Guided Light Passing Through a Packaged Optical Waveguide Device

Shizen Nakayama, Koichiro Ohkushi, Junpei Funatsuki, Tsuyoshi Konishi

IEEE Access 13 95489 - 95495 2025 [Refereed]

Authorship：Last author, Corresponding author

DOI
Phase Retrieval for Coherent Detection in Short-Reach Links Using Self-Interference of Aggregated Optical OFDM Subcarriers

Saki Fujimura, Ryohei Kamikawa, Tsuyoshi Konishi

IEICE Communications Express 12 ( 12 ) 607 - 610 2023.12 [Refereed]

Authorship：Last author

DOI
Data assimilation-based internal structure modeling for waveguide devices

Tsuyoshi Konishi, Junpei Funatsuki, Tomoya Kurahashi

Proceedings of SPIE; AI and Optical Data Sciences IV; 124380U (2023) 12438 244 - 247 2023.03 [Refereed] [Invited]

DOI

Scopus

1

Citation

(Scopus)
Photonic-Assisted Arbitrary Waveform Generation for Uplink Applications in beyond 5G taking advantage of Low Frequency Technology

Tsuyoshi Konishi, Yuta Kaihori, Masayuki Makino

Journal of Lightwave Technology 40 ( 20 ) 6608 - 6615 2022 [Refereed] [Invited]

Authorship：Lead author

DOI
Photonic-Assisted Digital-to-Analog Conversion taking advantage of Low frequency technology

Tsuyoshi Konishi, Yuta Kaihori, Masayuki Makino, Yu Yamasaki

2021 International Topical Meeting on Microwave Photonics (MWP) 2021.11 [Invited]

Authorship：Lead author

DOI
100-GHz FrOFDM-Based Serial-to-Parallel Converter and QPSK Modulation Format Applicability

Yu Yamasaki, Takuya Nakamichi, Yuta Kaihori, Gabriella Cincotti, Tsuyoshi Konishi

IEEE Journal of Selected Topics in Quantum Electronics 27 ( 2 ) 2021.03 [Refereed] [Invited]

Authorship：Last author
Further Development Potential of Photonic ADCs Under Contention Among Error Terms in SNR

Tsuyoshi KONISHI, Yuta KAIHORI, Yu YAMASAKI, Ryohei KAMIKAWA

2020.07 [Invited]

Authorship：Lead author
Enhanced Optical Communications through Joint Time-frequency Multiplexing Strategies

T. Konishi, T. Murakawa, T. Nagashima, S. Shimizu, M. Hasegawa, K. Hattori, M. Okuno, S. Mino, A. Himeno, N. Wada, H. Uenohara, T. Kodama, G. Cincotti

2020.01 [Refereed] [Invited] [International journal] [International coauthorship]

Authorship：Last author

DOI

Scopus

8

Citation

(Scopus)
Bandwidth adjustment and spectral defragmentation for optical networking unit using four wave mixing spectral compression

Yuta Kaihori, Yu Yamasaki, Tsuyoshi Konishi

Optics Express 2020.01 [Refereed]

Authorship：Last author

DOI

Scopus

2

Citation

(Scopus)
Flexible and lossless baud-rate switching for 4-time slots Nyquist OTDM signals using wavelength selective switch

Koji Takahashi, Yu Yamasaki, Takashi Inoue, Tsuyoshi Konishi

IEICE Electronics Express 2019.10 [Refereed]

Authorship：Last author

DOI

Scopus

1

Citation

(Scopus)
Low-loss Optical Nyquist Pulse Train Generation using Non-auxiliary Wavelength Selective Switch in Communication Band

Koji Takahashi, Yu Yamasaki, Takashi Inoue, Tsuyoshi Konishi

IEEE Photonics Journal 2019.03 [Refereed]

Authorship：Last author

DOI

Scopus

4

Citation

(Scopus)
Novel spectral resolution enhancement techniques for widespread multi-channel spectrometers

小西毅

応用物理 87 ( 5 ) 2018.05 [Refereed] [Invited]

J-GLOBAL
Experimental Demonstration of ASE Noise Suppression by Soliton Self-Frequency Shift

Y. Yamasaki, T. Nagashima, M. Hiraoka, T. Konishi

IEEE PHOTONICS TECHNOLOGY LETTERS 29 ( 14 ) 1167 - 1170 2017.05 [Refereed]

Authorship：Last author

DOI

Scopus

5

Citation

(Scopus)
Super spectral resolution beyond pixel Nyquist limits on multi-channel spectrometer

Tsuyoshi Konishi, Yu Yamasaki, Tomotaka Nagashima

OPTICS EXPRESS 24 ( 23 ) 26583 - 26598 2016.11 [Refereed]

DOI

Scopus

8

Citation

(Scopus)
Photonic Analog-to-Digital Conversion Technology and Future Development

99 ( 10 ) 992 - 998 2016.10 [Refereed] [Invited]

CiNii
Break Even Point Analysis of Photonic Analog-to-Digital Conversion on Power Consumption

T. Konishi, M. Hasegawa, T. Nagashima, T. Murakawa

ECOC 2015 41ST EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION 2015.09 [Refereed] [Invited]

DOI

Scopus

9

Citation

(Scopus)
Below 100-fs Timing Jitter Seamless Operations in 10-GSample/s 3-bit Photonic Analog-to-Digital Conversion

M. Hasegawa, T. Satoh, T. Nagashima, M. Mendez, T. Konishi

IEEE PHOTONICS JOURNAL 7 ( 3 ) 2015.05 [Refereed]

DOI

Scopus

29

Citation

(Scopus)
Advanced Optical Pulse Signal Profiling using Distributable "Optical Pulse Ruler"

Tsuyoshi Konishi, Tomotaka Nagashima, Takuya Murakawa

2014 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC) 2014.03 [Refereed]

DOI
Resolution upgrade toward 6-bit optical quantization using power-to-wavelength conversion for photonic analog-to-digital conversion

Koji Takahashi, Hideki Matsui, Tomotaka Nagashima, Tsuyoshi Konishi

Optics Letters 38 ( 22 ) 4864 - 4867 2013.10 [Refereed]

DOI

Scopus

54

Citation

(Scopus)
10-GS/s 5-bit Real-Time Optical Quantization for Photonic Analog-to-Digital Conversion

Takema Satoh, Koji Takahashi, Hideki Matsui, Kazuyoshi Itoh, Tsuyoshi Konishi

IEEE PHOTONICS TECHNOLOGY LETTERS 24 ( 10 ) 830 - 832 2012.04 [Refereed]

DOI

Scopus

42

Citation

(Scopus)
Five-bit parallel operation of optical quantization and coding for photonic analog-to-digital conversion

Tsuyoshi Konishi, Koji Takahashi, Hideki Matsui, Takema Satoh, Kazuyoshi Itoh

OPTICS EXPRESS 19 ( 17 ) 16106 - 16114 2011.07 [Refereed]

DOI

Scopus

51

Citation

(Scopus)
Diversity of optical signal processing led by optical signal form conversion

Tsuyoshi Konishi

2009 INTERNATIONAL WORKSHOP ON INFORMATION OPTICS 206 2009.07 [Invited]

DOI

Scopus

1

Citation

(Scopus)
Resolution improvement of all-optical analog-to-digital conversion employing self-frequency shift and self-phase-modulation-induced spectral compression

Takashi Nishitani, Tsuyoshi Konishi, Kazuyoshi Itoh

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS 14 ( 3 ) 724 - 732 2008.05 [Refereed]

DOI

Scopus

105

Citation

(Scopus)
All-optical M-ary ASK signal demultiplexer based on a photonic analog-to-digital conversion

T. Nishitani, T. Konishi, K. Itoh

Optics Express 2340 - 2342 2007.09 [Refereed]

DOI

Scopus

20

Citation

(Scopus)
Deterministic design of binary phase-only blazed grating with subwavelength features under limitation on spatial resolution of fabrication technique

Takehito Oonishi, Tsuyoshi Konishi, Kazuyoshi Itoh

Applied Optics 46 ( 22 ) 5019 - 5026 2007.07 [Refereed]

DOI

Scopus

8

Citation

(Scopus)
Ultrafast optical distortion equalizer using time-frequency domain processing

T. Konishi, Y. Oshita, K itoh

IEEE/OSA J. Lightwave Technology (Invited paper) 24 ( 7 ) 2693 - 2700 2006.06 [Invited]

DOI

Scopus

9

Citation

(Scopus)
All-optical digital-to-analog conversion using pulse pattern recognition based on optical correlation processing

T Nishitani, T Konishi, H Furukawa, K Itoh

OPTICS EXPRESS 13 ( 25 ) 10310 - 10315 2005.12 [Refereed]
Optical label recognition using additional pre-spread coding

Hideaki Furukawa, Tsuyoshi Konishi, Kazuyoshi Itoh

Electron Letters 40 ( 22 ) 1440 - 1442 2004.11 [Refereed]

DOI

Scopus

5

Citation

(Scopus)
Verification of Single Operation of Time-to-two-dimensional-space Conversion System by Using Image-intensified CCD Camera with Ultrashort Shutter

Y. Oshita, T. Konishi, W. Yu, K. Itoh, Y. Ichioka

2003.01
All optical Analog-to-Digital Converter by using Self-Frequency shift in Fiber andPulse shaping technique

T. Konishi, K. Tanimura, K. Asano, Y. Oshita, Y. Ichioka

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS 19 ( 11 ) 2817 - 2823 2002.11

DOI

Scopus

154

Citation

(Scopus)
Optical spectrogram scope (OSS) for measurement of ultrashort pulses

T Konishi, K Tanimura, Y Oshita, Y Ichioka

PHOTOREFRACTIVE FIBER AND CRYSTAL DEVICES: MATERIALS, OPTICAL PROPERTIES, AND APPLICATIONS VII, AND OPTICAL DATA STORAGE 4459 165 - 170 2002 [Refereed]
Ultrafast image transmission by optical time-to-two-dimensional-space-to-time-to-two-dimensional-space conversion

Tsuyoshi Konishi, Yoshiki Ichioka

Journal of the Optical Society of America A 16 ( 5 ) 1076 - 1088 1999.05 [Refereed]

DOI
Time-Space Conversion for Holographic Information with An Acoustic-optic Device

Tsuyoshi Konishi, Jun Tanida, Yoshiki Ichioka

1997.07

　View Summary

【工学部論文データから移行】
Evaluation method for 3D co-packaged optical waveguide devices using data assimilation of guided light changes

IEEE Photonics Society Summer Topicals Meeting Series 2025.07

Authorship：Lead author
Light path modeling using a guided light change passing through a 3D co-packaged optical device

Tsuyoshi Konishi, Shizen Nakayama, Junpei Funatsuki

2024 24th International Conference on Transparent Optical Networks (ICTON) 1 - 2 2024.07

Authorship：Lead author, Corresponding author

DOI
Experimental Verification of Data Aggregation Technique for Frequency Band Migration Technology for Beyond 5g

Masayuki MAKINO, Tomoki TSUJI, Tsuyoshi KONISHI

2023.10

Authorship：Last author

DOI
GHz-class Photonic Tunable Interleaver with Timing Jitter Compression Below 100 fs Based on a MHz-Class Low-Frequency Arbitrary Waveform Generator Upgraded by Optical Time Compression

Shizen Nakayama, Tomoki Tsuji, Masayuki Makino, Saki Fujimura, Tsuyoshi Konishi

2023 International Conference on Photonics in Switching and Computing (PSC) 1 - 3 2023.09 [Refereed]

Authorship：Last author

DOI
Low frequency technology driven high quality arbitrary waveform generation for beyond5G using photonic frequency migration assistance

T. Konishi, T. Tsuji, M. Makino

The 13th International Conference on Information Optics and Photonics (CIOP 2022) 2022.08
Data Assimilation Retrieval of Structure Model of Tapered Waveguides for Optical Coupling

Junpei Funatsuki, Tomoya Kurahashi, Tsuyoshi Konishi

2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC) 2022.07 [Refereed]

Authorship：Last author

DOI
Low-Complexity Coherent Detection for Short-Reach Links using Compressed Sensing and Self-Interference in Optical OFDM Subcarriers

Saki Fujimura, Ryohei Kamikawa, Tsuyoshi Konishi

2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC) 2022.07 [Refereed]

Authorship：Last author

DOI
Timing jitter suppression below 100 fs in photonic frequency band migration from MHz to GHz for Millimeter-wave Band Arbitrary Waveform Generation

Masayuki Makino, Yuta Kaihori, Tsuyoshi Konishi

2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC) 2022.07 [Refereed]

Authorship：Last author

DOI
Photonic-Assisted GHz high frequency signal synthesis taking advantage of MHz low frequency technology

Tsuyoshi Konishi, Yuta Kaihori, Masayuki Makino, Yu Yamasaki

Proc. of the 3rd URSI Atlantic Radio Science Meeting (AT-AP-RASC) 2022 2022.06 [Invited]

Authorship：Lead author
Silicon-based integration of optical pulse waveform analyzer

M. Makino, T. Kurahashi, V. Shukla, R. Kamikawa, Y. Kaihori, Y.Yamasaki, T. Konishi

Optoelectronics and Communications Conference 2021 (OECC 2021) 2021.07 [Refereed]

Authorship：Last author
Local oscillator-less QPSK signal detection using direct detection and fractional Fourier transform

R. Kamikawa, Y. Yamasaki, T. Konishi

Optoelectronics and Communications Conference 2021 (OECC 2021) 2021.07 [Refereed]

Authorship：Last author
Low complexity coherent detection using Fr-FT based intensive interference among neighborhood OFDM subcarriers

T.Konishi, R.Kamikawa, Y.Yamasaki, G.Cincotti

2021.07 [Invited]

Authorship：Lead author
Machine-learning-aided photonic hardware implementation incorporating natural optical phenomena

Tsuyoshi Konishi, Ryohei Kamikawa, Yu Yamasaki

Proc. SPIE AI and Optical Data Sciences II 11703 1170307 2021.03 [Invited]

Authorship：Lead author

DOI

Scopus
Demonstration of coherent detection technique for broadband optical comb light source

Satoshi Shimizu, Ryohei Kamikawa, Yuta Kaihori, Yu Yamasaki, Tsuyoshi Konishi

IEICE Electronics Express 18 ( 1 ) 20200383 - 20200383 2021.01 [Refereed]

Authorship：Last author

DOI
Experimental emulation of nonlinear distortion suppression by FrOFDM subcarriers

Yu Yamasaki, Tomotaka Nagashima, Gabriella Cincotti, Satoshi Shimizu, Kuninori Hattori, Masayuki Okuno, Shinji Mino, Akira Himeno, Naoya Wada, Hiroyuki Uenohara, Tsuyoshi Konishi

IEICE Electronics Express (ELEX) 17 ( 17 ) 20200241 2020.09 [Refereed] [International journal] [International coauthorship]

Authorship：Last author
Spectroscopic inspection optimization for edge computing in Industry 4.0

T. Konishi, T. Nakamichi, R. Kamikawa, Y. Yamasaki

2020.07 [Invited]

Authorship：Lead author
Power efficient fine spectral compression for high resolution optical quantization based on intensity-to-lambda conversion

T. Konishi, Y. Kaihori, Y. Yamasaki

2019.07 [Invited]

Authorship：Lead author

DOI

Scopus

3

Citation

(Scopus)
Resolution maximization toward over 7bit optical quantization based on intensity-tolambda conversion within C-band

Y. Kaihori, Y. Yamasaki, T. Konishi

2019.07 [Refereed]

Authorship：Last author

DOI

Scopus

4

Citation

(Scopus)
100 GHz Serial-to-parallel Conversion using N-OtDM-to-OFDM conversion via Fr-OFDM

T.Nakamichi, Y. Yamasaki, T. Konishi

2019.07 [Refereed]

Authorship：Last author

DOI

Scopus
Suppression Effect on Nonlinear Distortion in Long Haul Transmission using Fractional OFDM Subcarriers

Y. Yamasaki, T. Nagashima, G. Cincotti, S. Shimizu, K. Hattori, M. Okuno, S. Mino, A. Himeno, N. Wada, H. Uenohara, T. Konishi

2019.07 [Refereed]

Authorship：Last author

DOI

Scopus

2

Citation

(Scopus)
Flexible Baud-rate Switching for Nyquist OTDM Signals

K. Takahashi, Y. Yamasaki, T. Inoue, T. Konishi

2019.07 [Refereed]

Authorship：Last author

DOI

Scopus

1

Citation

(Scopus)
SNR improvement of picosecond optical pulse by ASE noise suppression for high resolution OTDR in IoT

Yu Yamasaki, Tsuyoshi Konishi

OECC/PSC 2019 - 24th OptoElectronics and Communications Conference/International Conference Photonics in Switching and Computing 2019 2019.07

DOI

Scopus
Performance evaluation of fractional OFDM for extending transmission distance without reducing spectral efficiency

Y.Yamasaki, T.Nagashima, G.Cincotti, S.Shimizu, N.Wada, H.Uenohara, T.Konishi

Optics Communications 2019.04 [Refereed] [International journal] [International coauthorship]

Authorship：Last author

DOI

Scopus

5

Citation

(Scopus)
Enhanced Optical Communications through Joint Time-frequency Multiplexing Strategies

T. Konishi, T. Murakawa, T. Nagashima, S. Shimizu, M. Hasegawa, K. Hattori, M. Okuno, S. Mino, A. Himeno, N. Wada, H. Uenohara, T. Kodama, G. Cincotti

2019.03 [Invited] [International coauthorship]

Authorship：Lead author

DOI
Optical Nyquist pulse train generation by non-auxiliary wavelength selective switch in communication band

K. Takahashi, Y. Yamasaki, T. Inoue, T. Konishi

Next-Generation Optical Communication: Components, Sub-Systems, and Systems VIII. International Society for Optics and Photonics, 2019. 2019.02 [Refereed]

Authorship：Last author

DOI

Scopus

1

Citation

(Scopus)
Inter-symbol interference suppression for a hybrid use of OFDM and N-OTDM based on Fr-OFDM

T. Konishi, Y. Yamasaki, S. Shimizu, G. Cincotti, N. Wada, H. Uenohara

2018.09 [Refereed] [International coauthorship]

Authorship：Lead author
光信号処理によるアナログ／デジタル変換の光化

小西毅

電子情報通信学会大会講演論文集(CD-ROM) 2018 2018.09 [Invited]

Authorship：Lead author, Last author, Corresponding author

J-GLOBAL
Multifunctional Wavelength-Selective Switch for Nyquist Pulse Generation and Multiplexing

K. Takahashi, K. Watanabe, T. Inoue, T. Konishi

IEEE Photonics Technology Letters 30 ( 18 ) 1641 - 1644 2018.08 [Refereed]

Authorship：Last author

DOI

Scopus

11

Citation

(Scopus)
Proper selection of ASE noise suppression techniques for a probe pulse in fine resolution optical fiber sensing

Y. Yamasaki, D. Ishihara, T. Konishi

2018.05 [Refereed]

Authorship：Last author
Compact and cost-effective multi-channel optical spectrometer for fine FBG sensing in IoT technology

Tsuyoshi Konishi, Yu Yamasaki

Proceedings of SPIE - The International Society for Optical Engineering 10551 2018.01 [Refereed]

Authorship：Lead author

DOI

Scopus

4

Citation

(Scopus)
Peak-to-average power ratio reduction of transmission signal of all-optical orthogonal time/frequency domain multiplexing using fractional Fourier transform

T. Nagashima, G. Cincotti, T. Murakawa, S. Shimizu, M. Hasegawa, K. Hattori, M. Okuno, S. Mino, A. Himeno, N. Wada, H. Uenohara, T. Konishi

OPTICS COMMUNICATIONS 402 123 - 127 2017.11 [Refereed]

Authorship：Last author

DOI

Scopus

11

Citation

(Scopus)
SNR improvement of Fractional OFDM-based serial-to-parallel conversion for Nyquist OTDM signals

小西毅, 山崎佑, 平岡幹基

電子情報通信学会技術研究報告 117 ( 322 ) 7 - 10 2017.11

Authorship：Lead author

CiNii J-GLOBAL
Experimental demonstration of cyclic prefix insertion for all-optical fractional OFDM

T. Nagashim, G. Cincotti, T. Murakawa, S. Shimizu, M. Hasegawa, K. Hattori, M. Okuno, S. Mino, A. Himeno, N. Wada, H. Uenohara, T. Konishi

OPTICS COMMUNICATIONS 396 185 - 190 2017.08 [Refereed]

Authorship：Last author

DOI

Scopus

3

Citation

(Scopus)
ナイキストパルスと線形な手法による時間レンズを用いた光シリアル－パラレル変換

小西毅

2017.06 [Invited]

Authorship：Lead author

　View Summary

光ネットワーク超低エネルギー化技術拠点」NASG会合レクチャー、秋葉原UDXビル(2017年2月27日)
Power efficient optical serialto-parallel conversion using fractional OFDM-based linear technique

Motoki Hiraoka, Tomotaka Nagashima, Gabriella Cincotti, Satoshi Shimizu, Yu Yamasaki, Kuninori Hattori, Masayuki Okuno, Shinji Mino, Akira Himeno, Naoya Wada, Hiroyuki Uenohara, Tsuyoshi Konishi

IEICE ELECTRONICS EXPRESS 14 ( 6 ) 2017.03 [Refereed]

DOI

Scopus

4

Citation

(Scopus)
40 GSample/s All-Optical Analog to Digital Conversion With Resolution Degradation Prevention

Tomotaka Nagashima, Makoto Hasegawa, Tsuyoshi Konishi

IEEE PHOTONICS TECHNOLOGY LETTERS 29 ( 1 ) 74 - 77 2017.01 [Refereed]

Authorship：Last author

DOI

Scopus

47

Citation

(Scopus)
Cost effective all-optical fractional OFDM receiver using an arrayed waveguide grating

T. Nagashima, G. Cincotti, T. Murakawa, S. Shimizu, M. Hasegawa, K. Hattori, M. Okuno, S. Mino, A. Himeno, N. Wada, H. Uenohara, T. Konishi

OPTICAL FIBER TECHNOLOGY 32 119 - 122 2016.11 [Refereed]

DOI

Scopus

9

Citation

(Scopus)
Linear technique of optical quantization for photonic analog-to-digital conversion

Tsuyoshi Konishi, Motoki Hiraoka, Yu Yamasaki, Tomotaka Nagashima

2016 IEEE PHOTONICS CONFERENCE (IPC) 554 - 555 2016.10 [Invited]
Cost Effective Fractional OFDM Receiver using Arrayed Waveguide Grating

T. Nagashima, G. Cincotti, T. Murakawa, S. Shimizu, M. Hasegawa, K. Hattori, M. Okuno, S. Mino, A. Himeno, N. Wada, H. Uenohara, T. Konishi

2016 21ST OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) HELD JOINTLY WITH 2016 INTERNATIONAL CONFERENCE ON PHOTONICS IN SWITCHING (PS) 2016.07 [Refereed]

DOI

Scopus

9

Citation

(Scopus)
Cost Effective Fractional OFDM Receiver using Arrayed Waveguide Grating

T. Nagashima, G. Cincotti, T. Murakawa, S. Shimizu, M. Hasegawa, K. Hattori, M. Okuno, S. Mino, A. Himeno, N. Wada, H. Uenohara, T. Konishi

2016 21ST OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) HELD JOINTLY WITH 2016 INTERNATIONAL CONFERENCE ON PHOTONICS IN SWITCHING (PS) 2016.07 [Refereed]
Nonlinear-Error-Free Optical Quantization Using Dense Spectral Slicing

Takahiro Kodama, Ryosuke Matsumoto, Akihiro Maruta, Tsuyoshi Konishi, Ken-ichi Kitayama

IEICE TRANSACTIONS ON COMMUNICATIONS E99B ( 3 ) 647 - 653 2016.03 [Refereed]

DOI

Scopus
Nonlinear-error-free optical quantization using dense spectral slicing

Takahiro Kodama, Ryosuke Matsumoto, Akihiro Maruta, Tsuyoshi Konishi, Ken-Ichi Kitayama

IEICE Transactions on Communications E99-B ( 3 ) 647 - 653 2016.03 [Refereed]

DOI

Scopus
たった一本の光ファイバをつなぐだけの光パルスの質検査技術~

小西毅

光アライアンス 27 ( 1 ) 46 - 50 2016.01 [Invited]

CiNii
Time-Frequency Photonic Signal Processing

G. Cincotti, T. Konishi, T. Murakawa, T. Nagashima, S. Shimizu, M. Hasegawa, K. Hattori, M. Okuno, S. Mino, A. Himeno, N. Wada, H. Uenohara

2016 21ST OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) HELD JOINTLY WITH 2016 INTERNATIONAL CONFERENCE ON PHOTONICS IN SWITCHING (PS) 2016 [Refereed]
Flexible OFDM-based access systems with intrinsic function of chromatic dispersion compensation

Tsuyoshi Konishi, Takuya Murakawa, Tomotaka Nagashima, Makoto Hasegawa, Satoshi Shimizu, Kuninori Hattori, Masayuki Okuno, Shinji Mino, Akira Himeno, Hiroyuki Uenohara, Naoya Wada, Gabriella Cincotti

OPTICAL FIBER TECHNOLOGY 26 94 - 99 2015.08 [Refereed] [Invited]

DOI

Scopus

12

Citation

(Scopus)
Quantization Error Improvement for Optical Quantization Using Dual Rail Configuration

Tomotaka Nagashima, Makoto Hasegawa, Takuya Murakawa, Tsuyoshi Konishi

IEICE TRANSACTIONS ON ELECTRONICS E98C ( 8 ) 808 - 815 2015.08 [Refereed]

DOI

Scopus

1

Citation

(Scopus)
Pulse-by-pulse near 800-nm band power stabilization using all-optical limiter based on self-phase modulation

Takuya Murakawa, Tsuyoshi Konishi

OPTICS COMMUNICATIONS 344 134 - 138 2015.01 [Refereed]

DOI

Scopus

7

Citation

(Scopus)
アレイ形導波路回折格子を用いた低消費電力光量子化技術

小玉崇宏, 丸田章博, 小西毅, 北山研一

2014.03 [Invited]
A Near-Infrared Range All-Optical Limiter Based on Self-Phase Modulation

Takuya Murakawa, Ryosuke Nagao, Tsuyoshi Konishi

2014.02 [Refereed]
100-GS/s 5-bit real-time optical quantization for photonic analog-to-digital conversion

Takema Satoh, Kazuyoshi Itoh, Tsuyoshi Konishi

IEICE Transactions on Electronics E96-C ( 2 ) 223 - 226 2014.01 [Refereed]

DOI

Scopus

2

Citation

(Scopus)
Connectivity Verification Between Optical Sampling and Quantization Techniques for All-Optical Analog-to-Digital Conversion

T. Satoh, M. Hasegawa, K. Itoh, T. Konishi

2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR) 2013.07 [Refereed]

DOI

Scopus

1

Citation

(Scopus)
Photonic Analog-to-Digital conversion with emphasis on parallel-configuration-free characteristics

T. Konishi, K. Takahashi, H. Matsui, T. Satoh

2013.07 [Invited]

　View Summary

SP1D.2 , Rio Mar Beach Resort, Rio Grande, PuertoRico, July 14-17, 2013

DOI
Optical Quantization for 7-bit Photonic A/D Conversion

Tsuyoshi Konishi, Takema Satoh, Makoto Hasegawa, Tomotaka Nagashima

2013 15TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON 2013) 2013.06 [Invited]
40-Gb/s and Highly Accurate All-Optical Intensity Limiter Driving Low-Power-Consumption Based on Self-Phase Modulation by Using Numerical Simulation

Kentaro Kawanishi, Kazuyoshi Itoh, Tsuyoshi Konishi

IEICE TRANSACTIONS ON ELECTRONICS E96C ( 2 ) 220 - 222 2013.02 [Refereed]

DOI

Scopus
100-GS/s 5-bit real-time optical quantization for photonic analog-to-digital conversion

Takema Satoh, Kazuyoshi Itoh, Tsuyoshi Konishi

IEICE Transactions on Electronics E96-C ( 2 ) 223 - 226 2013.01 [Refereed]

DOI

Scopus

2

Citation

(Scopus)
Optical Quantization for 6 bit Photonic A/D Conversion

Tsuyoshi Konishi, Koji Takahashi, Hideki Matsui, Takema Satoh

2012 14TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON 2012) 2012.11

DOI

Scopus

6

Citation

(Scopus)
6bit Optical Quantization and Coding for Digital Coherent Techniques

Tsuyoshi KONISHI, Koji TAKAHASHI, Hideki MATSUI, Takema SATOH

2012.11 [Invited]
10-GS/s 5-bit Real-Time Optical Quantization for Photonic Analog-to-Digital Conversion

Takema Satoh, Koji Takahashi, Hideki Matsui, Kazuyoshi Itoh, Tsuyoshi Konishi

IEEE PHOTONICS TECHNOLOGY LETTERS 24 ( 10 ) 830 - 832 2012.05 [Refereed]

DOI

Scopus

42

Citation

(Scopus)
40-Gbps 6-bit Optical Coding in a Bit-Serial Format for Photonic Analog-to-Digital Conversion

H. Matsui, K. Takahashi, T. Satoh, K. Itoh, T. Konishi

2012.04 [Refereed]
Quantization Error Improvement of All-Optical Quantization Using Dual Rail Generation of SSFS in a fiber

K. Takahashi, H. Matsui, K. Itoh, T. Konishi

2012.04 [Refereed]
Numerical Demonstration of Low-Power-Consumption and Highly Accurate All-Optical Intensity Limiter Based on Self-Phase Modulation for 40-Gb/s Optical Signals

K. Kawanishi, K. Itoh, T. Konishi

2012.04 [Refereed]
デュアルレール全光量子化を用いた全光量子化の量子化誤差改善の試み

高橋考二, 松井秀樹, 佐藤豪真, 永島知貴, 伊東一良, 小西毅

2012.03
デュアルレール全光量子化を用いた全光量子化の量子化誤差改善の試み

高橋考二, 松井秀樹, 佐藤豪真, 伊東一良, 小西毅

2012.03
光アナログ-ディジタル変換における40-Gbpsビットシリアル形式に基づく6ビット光符号化

松井秀樹, 高橋考二, 佐藤豪真, 伊東一良, 小西毅

2012.03
光A/D変換における100GS/s 5bitリアルタイム光量子化の検討

佐藤豪真, 高橋考二, 松井秀樹, 伊東一良, 小西毅

2012.03
Photonic Analog-to Digital Conversion using Self-Frequency Shift

Tsuyoshi KONISHI

2012.03 [Invited]
New measurement tool development for ultra-short pulse characterization

Tsuyoshi KONISHI

2012.02 [Invited]
Highly Accurate Compensation Technique for 10-GHz Pulse Intensity Fluctuation Using SPM-Based All-Optical Intensity Limiter

Kentaro Kawanishi, Florence Drouet, Kazuyoshi Itoh, Tsuyoshi Konishi

IEEE PHOTONICS TECHNOLOGY LETTERS 24 ( 2 ) 119 - 121 2012.01

DOI

Scopus

8

Citation

(Scopus)
Power-Saving Approach Toward 7-bit Optical Quantization for Photonic Analog-to-Digital Conversion

T. Satoh, T. Nagashima, K. Itoh, T. Konishi

2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR) 2011.12 [Invited]

DOI

Scopus

14

Citation

(Scopus)
10-GS/s Transparent Optical Quantization with 5-bit resolution for Photonic Analog-to-Digital Conversion

T. Satoh, K. Takahashi, H. Matsui, K. Itoh, T.Konishi

2011.12 [Refereed]
Experimental Demonstration of 10-GS/s 5-bit Optical Quantization for Photonic Analog-to-Digital Conversion

SATOH Takema, TAKAHASHI Koji, MATSUI Hideki, ITOH Kazuyoshi, KONISHI Tsuyoshi

Technical report of IEICE. LQE 111 ( 267 ) 13 - 16 2011.10

　View Summary

We report the experimental demonstration of 10-GS/s 5-bit optical quantization using soliton self-frequency shift (SSFS) and multi-stage spectral compression. Previously, we realized 5-bit optical quantization using a relatively low repetitive frequency laser to provide a sufficient peak power for generation of SSFS because this scheme has the inherent feature of sampling rate transparency. In this work, we experimentally test the high-speed operation of our 5-bit optical quantization system by transmitting 10-Gb/s multi intensity level signals in order to prove the feature of sampling rate transparency at 10 GS/s. Furthermore, to confirm the reliability of our system, we executed the bit-error-rate (BER) measurement.

CiNii
Optical Quantization and Coding for 5bit Photonic A/D Conversion

Tsuyoshi Konishi, Koji Takahashi, Hideki Matsui, Takema Satoh

2011 13TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON) 2011.07 [Invited]

DOI

Scopus
Experimental Demonstration of 10-GS/s 5-bit Optical Quantization for Photonic Analog-to-Digital Conversion

T. Satoh, K. Takahashi, H. Matsui, T. Konishi, K. Itoh

2011.07
Optical coding by 2-dimensional stacked pulse shapers for 6bit photonic analog-to-digital conversion

H. Matsui, K. Takahashi, T. Konishi, K. Itoh

2011.07 [Refereed]
6bit all-optical quantization using soliton self-frequency shift and multistage SPM-based spectral compression

K. Takahashi, H, Matsui, T. Konishi, K. Itoh

16th Opto-Electronics and Communications Conference (OECC 2011), Kaoshiung, Taiwan, July 8 2011.07 [Refereed]

Authorship：Corresponding author

CiNii
Stabilized Generation of Wavelength Conversion by Using High-Accurate Self-Phase Modulation Based All-Optical Limiter

Kentaro Kawanishi, Tsuyoshi Konishi, Hiroomi Goto, Kazuyoshi Itoh

OPTICAL REVIEW 18 ( 1 ) 124 - 127 2011.02 [Refereed]

DOI

Scopus

1

Citation

(Scopus)
Influence of Amplitude Distortion in Optical Code Decoding

T. KONISHI, K. KAWANISHI

2010.12 [Refereed]
Adaptive intensity stabilization of ultra-short optical pulse for optical measurement and metrology

Tsuyoshi Konishi, Kentaro Kawanishi

OPTICAL DESIGN AND TESTING IV 7849 2010.10 [Refereed] [Invited]

DOI

Scopus

1

Citation

(Scopus)
Wavelength- and Time-Selective Reconfigurable Optical Add/Drop Multiplexer Using Time-Frequency Domain Processing

Tsuyoshi Konishi, Ryosuke Itoh, Kazuyoshi Itoh

EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING 2010.07 [Refereed]

DOI

Scopus

3

Citation

(Scopus)
Stabilization of Wavelength Conversion Using High-Stable Optical Limiting Based on Self-Phase Modulation

Tsuyoshi Konishi, Kentaro Kawanishi

2010 12TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON) 2010.06 [Refereed] [Invited]
Study on stabilized generation of optical nonlinear effect by using highly accurate SPM-based all-optical limiter

K. Kawanishi, T. Konishi, H. Goto, K. Itoh

2010.04 [Refereed]
Flattening of LED light intensity using wavefront transformation by diffractive optical element

S. Maeda, J. Tokuda, T. Nishiki, H. Goto, M. Kitsunai, R. Nishikawa, T. Konishi, K. Itoh

2010.04 [Refereed]
All optical analog-to-digital conversion: Principle and recent progress

Tsuyoshi Konishi, Hiroomi Goto, Takuya Kato, Kentaro Kawanishi

2009 15th Asia-Pacific Conference on Communications, APCC 2009 487 - 490 2009.10 [Refereed] [Invited]

DOI

Scopus

3

Citation

(Scopus)
Advanced Optical Limiting Function Based on Effective Understanding of Physical Phenomena

Tsuyoshi Konishi, Hiroomi Goto, Takuya Kato, Kentaro Kawanishi

ICTON: 2009 11TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS, VOLS 1 AND 2 337 - 340 2009.06 [Refereed] [Invited]
Simultaneous amplitude and phase modulation by a discrete phase-only filter

Hiroomi Goto, Tsuyoshi Konishi, Kazuyoshi Itoh

OPTICS LETTERS 34 ( 5 ) 641 - 643 2009.05 [Refereed]

DOI

Scopus

5

Citation

(Scopus)
Efficiency improvement of optical pattern recognition in ultra-fast all-optical intensity equalizer

Hiroomi Goto, Tsuyoshi Konishi, Kazuyoshi Itoh

OPTICAL REVIEW 16 ( 2 ) 180 - 183 2009.03 [Refereed]

DOI

Scopus
All-optical analog-to-digital conversion system with a spatial coding method using designed filter

Takuya Kato, Tsuyoshi Konishi, Takashi Nishitani, Kazuyoshi Itoh

OPTICAL REVIEW 16 ( 2 ) 184 - 187 2009.03 [Refereed]

DOI

Scopus

5

Citation

(Scopus)
Ultrafast All-Optical Intensity Stabilizer Based on Self Phase Modulation-Induced Spectral Pattern Change and Optical Pattern Recognition

Hiroomi Goto, Tsuyoshi Konishi, Kazuyoshi Itoh

JAPANESE JOURNAL OF APPLIED PHYSICS 47 ( 12 ) 8834 - 8837 2008.12 [Refereed]

DOI

Scopus

10

Citation

(Scopus)
Dynamic time-spread/wavelength-hopping OCDM code generator for SSP codes

Tsuyoshi KONISHI

Proc. of the 3rd International Workshop on OPS & OCDMA 2008.10 [Invited]
超短光パルスの時間―周波数分布計測技術―光の楽譜を用いた超高速光信号の理解を―

小西毅

光アライアンス 19 ( 10 ) 27 - 31 2008.10 [Invited]

CiNii
An all-optical limiter with high-accuracy thresholding based on self-phase modulation assisted by preparatory waveform conversion

Hiroomi Goto, Tsuyoshi Konishi, Kazuyoshi Itoh

Journal Journal of Optics A: Pure and Applied Optics 10 ( 9 ) 2008.09 [Refereed]

DOI

Scopus

9

Citation

(Scopus)
New Tool for Response Characteristic Test of Optical Devices:Optical Spectrogram Scope

Tsuyoshi Konishi, Hiroomi Goto

Proc. of Photonics in Switching 2008 2008.08 [Refereed] [Invited]
Expansion of Dynamic Range of All-Optical Intensity Equalizer based on Effective Self-Phase-Modulation by using Pre-Chirped Signals

H. Goto, T. Konishi, R. Itoh, T. Enoki, T. Nishitani, K. Itoh

2008 INTERNATIONAL CONFERENCE ON PHOTONICS IN SWITCHING 28 - 29 2008.08 [Refereed]
Amplitude-Phase Modulation Technique using Phase-Only Filter for Optical Intensity Equalizer

Hiroomi Goto, Tsuyoshi Konishi, Takashi Nishitani, Kazuyoshi Itoh

Proc. of ODF'08 2008.06 [Refereed]
All optical processing and monitoring technologies

Tsuyoshi KONISHI

Proc. of SEON2008 2008.06 [Invited]
All optical intensity equalizer based on effective control of spectral modulation induced by self-phase-modulation using super-Gaussian signals

Hiroomi Goto, Tsuyoshi Konishi, Takashi Nishitani, Kazuyoshi Itoh

ICTON 2008: PROCEEDINGS OF 2008 10TH ANNIVERSARY INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS, VOL 1 124 - 127 2008.06 [Refereed]
Response characteristics test of ultra-fast optical devices with optical spectrogram scope (OSS)

Tsuyoshi Konishi, Hiroomi Goto

ICTON 2008: PROCEEDINGS OF 2008 10TH ANNIVERSARY INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS, VOL 1 81 - 83 2008.06 [Refereed] [Invited]
All-optical analog-to-digital conversion using a designed spatial coding filter

Takuya Kato, Tsuyoshi Konishi, Takashi Nishitani, Kazuyoshi Itoh

Proc. of ODF'08 2008.06 [Refereed]
Measurement of frequency, wavelength, or time-frequency of ultra-short pulse

Tsuyoshi KONISHI

Optical and Electro-Optical Engineering Contact 45 ( 11 ) 595 - 602 2007.11 [Invited]

CiNii
Optical coding scheme using optical interconnection for high sampling rate and high resolution photonic analog-to-digital conversion

Takashi Nishitani, Tsuyoshi Konishi, Kazuyoshi Itoh

Optics Express 15 ( 24 ) 15812 - 15817 2007.11 [Refereed]

DOI

Scopus

54

Citation

(Scopus)
Design and evaluation of computer generated hologram with binary subwavelength structure designed by deterministic process

Takehito Oonishi, Tsuyoshi Konishi, Kazuyoshi Itoh

OPTICAL REVIEW 14 ( 5 ) 334 - 338 2007.09 [Refereed]

DOI

Scopus

2

Citation

(Scopus)
Fabrication of Phase Only Binary Blazed Grating with Subwavelength Structures Designed by Deterministic Method Based on Electromagnetic Analysis

Takehito Oonishi, Tsuyoshi Konishi, Kazuyoshi Itoh

Japanese Journal of Applied Physics 46 ( 8B ) 5435 - 5440 2007.08 [Refereed]

DOI

Scopus

3

Citation

(Scopus)
Optical signal processing promoted by optical data form conversion

Tsuyoshi Konishi

ICTON 2007: Proceedings of the 9th International Conference on Transparent Optical Networks, Vol 2 25 - 28 2007.06 [Refereed] [Invited]
Performance analysis of ultra-fast all-optical analog-to-digital converter using optical multiple-level thresholding module based on self-frequency shift in fiber

Tsuyoshi Konishi, Takashi Nishitani, Kazuyoshi Itoh

IEICE TRANSACTIONS ON ELECTRONICS E90C ( 2 ) 405 - 408 2007.02 [Invited]

DOI

Scopus
All-optical analogeeto-digital conversion using optical delay line encoders

Takashi Nishitani, Tsuyoshi Konishi, Kazuyoshi Itoh

IEICE TRANSACTIONS ON ELECTRONICS E90C ( 2 ) 479 - 480 2007.02 [Refereed]

DOI

Scopus

5

Citation

(Scopus)
Demonstration of 4-bit photonic analog-to-digital conversion employing self-frequency shift and SPM-induced spectral compression

Takashi Nishitani, Tsuyoshi Konishi, Kazuyoshi Itoh

2007 33rd European Conference and Exhibition of Optical Communication, ECOC 2007 2007

DOI

Scopus

15

Citation

(Scopus)
Ultra-fast optical signal processing using optical time-space conversion

Tsuyoshi Konishi

2007 PACIFIC RIM CONFERENCE ON LASERS AND ELECTRO-OPTICS, VOLS 1-4 1175 - 1176 2007 [Refereed]
Demonstration of an ultra-fast encryption for an OTDM/WDM signal expressed as a 2D image

Ryosuke Itoh, Tsuyoshi Konishi, Kazuyoshi Itoh

2007 PACIFIC RIM CONFERENCE ON LASERS AND ELECTRO-OPTICS, VOLS 1-4 1187 - 1188 2007 [Refereed]
Unitary variable threshold optical limiter without bulky optical systems

Hiroomi Goto, Tsuyoshi Konishi, Kazuyoshi Itoh

2007 PACIFIC RIM CONFERENCE ON LASERS AND ELECTRO-OPTICS, VOLS 1-4 1179 - 1180 2007 [Refereed]
Photon Block Project

J. Takahara, K. Manseki, T. Konishi

OYO BUTURI 76 ( 1 ) 34 - 38 2007.01 [Refereed] [Invited]
Self-controlled Variable Threshold Optical Limiter using Photochromism of Bacteriorhodopsin Film

Hiroomi Goto, Tsuyoshi Konishi, Kazuyoshi Itoh

2006.12
Deterministic Design of Binary Diffractive Optical Element with Subwavelength Features for phase moduration under Limitation on Spatial Resolusion of Fabrication Technique

Takehito Oonishi, Tsuyoshi Konishi, Kazuyoshi Itoh

2006.12
Reduced wavelength-dependent quarter-wave plate fabricated by a multilayered subwavelength structure

Wanji Yu, Akio Mizutani, Hisao Kikuta, Tsuyoshi Konishi

Applied Optics 45 ( 12 ) 2601 - 2606 2006.12

DOI

Scopus

30

Citation

(Scopus)
All-optical analogue-to-digital conversion with bitwise signal allocation using a spatial coding method for 3bit grey code

T. Nishitani, T. Konishi, K. Itoh

2006 INTERNATIONAL CONFERENCE ON PHOTONICS IN SWITCHING, PROCEEDINGS 209 - + 2006.11

DOI

Scopus
All-optical analogue-to-digital conversion with bitwise signal allocation using a spatial coding method for 3bit grey code

T. Nishitani, T. Konishi, K. Itoh

2006 INTERNATIONAL CONFERENCE ON PHOTONICS IN SWITCHING, PROCEEDINGS 209 - + 2006.11
Deterministic Design of Binary Phase Only Diffractive Optical Element with Subwavelength Feature Based on Electromagnetic Analysis

Takehito Oonishi, Tsuyoshi Konishi, Kazuyoshi Itoh

2006.09
Arbitrary wavelength- and time-selective reconfigurable optical add/drop multiplexer (ROADM) using a time-space conversion and a MEMS optical switch

Ryosuke Itoh, Tsuyoshi Konishi, Kazuyoshi Itoh

2006 European Conference on Optical Communications Proceedings, ECOC 2006 2006.09

DOI

Scopus

1

Citation

(Scopus)
All-optical M-ary ASK signal demultiplexer based on a photonic analog-to-digital conversion

Takashi Nishitani, Tsuyoshi Konishi, Kazuyoshi Itoh

OPTICS EXPRESS 15 ( 25 ) 17025 - 17031 2006.09
Wavelength- and time-division reconfigurable optical add/drop multiplexer (ROADM) using a time-space conversion and a MEMS optical switch

R. Itoh, T. Konishi, K. Itoh

OPTICAL TRANSMISSION, SWITCHING, AND SUBSYSTEMS IV, PTS 1 AND 2 6353 2006.08

DOI

Scopus

1

Citation

(Scopus)
All-optical analog-to-digital conversion using optical interconnection for gray code coding

Takashi Nishitani, Tsuyoshi Konishi, Kazuyoshi Itoh

OPTICAL TRANSMISSION, SWITCHING, AND SUBSYSTEMS IV, PTS 1 AND 2 6353 2006.08

DOI

Scopus

4

Citation

(Scopus)
All-optical analogeeto-digital conversion using optical delay line encoders

Takashi Nishitani, Tsuyoshi Konishi, Kazuyoshi Itoh

IEICE TRANSACTIONS ON ELECTRONICS E90C ( 2 ) 479 - 480 2006.07

DOI

Scopus

5

Citation

(Scopus)
時間・波長・空間軸での光信号変換を用いた超高速光信号処理技術

小西毅

O plus E 2006.05 [Invited]
All-optical M-ary ASK signal demultiplexer based on photonic analog-to-digital conversion with bitwise signal allocation

Takashi Nishitani, Tsuyoshi Konishi, Kazuyoshi Itoh

2006 OPTICAL FIBER COMMUNICATION CONFERENCE/NATIONAL FIBER OPTIC ENGINEERS CONFERENCE, VOLS 1-6 2340 - 2342 2006.04

DOI

Scopus
All-Optical Analog-to-Digital Conversion Using Optical Multi-Thresholding Module Based on Self-Frequency Shift in Fiber

Tsuyoshi KONISHI

2006.04 [Invited]
Demonstration and evaluation of all-optical digital-to-analog conversion using pulse pattern recognition based on optical correlation processing

T. Nishitani, T. Konishi, K. Itoh, H. Furukawa

2006 OPTICAL FIBER COMMUNICATION CONFERENCE/NATIONAL FIBER OPTIC ENGINEERS CONFERENCE, VOLS 1-6 2343 - + 2006 [Refereed]
Discrimination of all types of 4-bit optical code by optical time-gating and designed label recognition filter in label recognition using optical correlation

H Furukawa, T Konishi, K Itoh, N Wada, T Miyazaki

IEICE TRANSACTIONS ON COMMUNICATIONS E88B ( 10 ) 3841 - 3847 2005.10 [Refereed]

DOI

Scopus

6

Citation

(Scopus)
超高速光スペクトログラムスコープの開発

小西毅

The Ostec 2005.03 [Invited]
Design of a label recognition filter for crosstalk suppression in a label recognition unit using optical correlation assuming the assistance of optical time-gating

H Furukawa, T Konishi, K Itoh

OPTICAL REVIEW 12 ( 3 ) 242 - 246 2005.03 [Refereed]

DOI

Scopus
Integration of a proposed all-optical analog-to-digital converter using self-frequency shifting in fiber and a pulse-shaping technique

Takashi Nishitani, Tsuyoshi Konishi, Kazuyoshi Itoh

Optical Review 12 ( 3 ) 237 - 241 2005.03 [Refereed]

DOI

Scopus

22

Citation

(Scopus)
The integration of the all-optical analog-to-digital converter by use of self-frequency shifting in fiber and a pulse-shaping technique

Takashi Nishitani, Tsuyoshi Konishi, Kazuyoshi Itoh

IFIP Advances in Information and Communication Technology 164 430 - 437 2005

DOI

Scopus
Optical label recognition based on additional pre-spread coding

Hideaki Furukawa, Tsuyoshi Konishi, Kazuyoshi Itoh, Naoya Wada, Fumito Kubota

IFIP Advances in Information and Communication Technology 164 279 - 283 2005
Optical label recognition based on additional pre-spread coding

H Furukawa, T Konishi, K Itoh, N Wada, F Kubota

OPTICAL NETWORKS AND TECHNOLOGIES 164 279 - 283 2005 [Refereed]
The integration of the all-optical analog-to-digital converter by use of self-frequency shifting in fiber and a pulse-shaping technique

T Nishitani, T Konishi, K Itoh

OPTICAL NETWORKS AND TECHNOLOGIES 164 430 - 437 2005 [Refereed]
Design of header recognition filter for binary phase shift keying in header recognition unit using time-space conversion

H Furukawa, T Konishi, Y Oshita, W Yu, K Itoh, Y Ichioka

OPTICAL REVIEW 11 ( 2 ) 119 - 125 2004.11 [Refereed]

DOI

Scopus

13

Citation

(Scopus)
Device fabrication and information processing with femtosecond laser pulses

K. Itoh, T. Konishi, W. Watanabe

2004.07 [Invited]
Suppression of crosstalk in header recognition based on optical correlation using multiple-object discriminant filter

H Furukawa, T Konishi, Y Oshita, WJ Yu, K Itoh, Y Ichioka

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 43 ( 10 ) 7065 - 7071 2004.06

DOI

Scopus

4

Citation

(Scopus)
Synthesis of wave plates using multilayered subwavelength structure

W. Yu, K. Satoh, H. Kikuta, T. Konishi, T. Yotsuya

JAPANESE JOURNAL OF APPLIED PHYSICS 43 ( 4A ) L439 - L441 2004.04 [Refereed]

DOI
Application of ultrafast time-to-two-dimensional-space-to-time conversion (II): Time-varying spectral control for arbitrary ultrafast signal reshaping

Y. Oshita, T. KONISHI, W. Yu, H. Furukawa, K. Itoh, Y. Ichioka

IEEE PHOTONICS TECHNOLOGY LETTERS 16 ( 2 ) 623 - 625 2004.02

DOI

Scopus

12

Citation

(Scopus)
Parallel detection of multiple transitional spectral patterns using optical spectrogram scope

K. Tanimura, T. Konishi, Y. Oshita, W. Yu, K. Itoh

Optical Review 11 ( 1 ) 12 - 18 2004.02

DOI
Sensitive detection of transitional spectral pattern using optical spectrogram scope

K. Tanimura, T. Konishi, Y. Oshita, W. Yu, K. Itoh, Y. Ichioka

JAPANESE JOURNAL OF APPLIED PHYSICS 42 ( 12 ) 7318 - 7325 2003.12

DOI
Ultra-fast spatio-temporal conversion and processing

Tsuyoshi KONISHI

32 ( 10 ) 619 - 622 2003.10 [Refereed] [Invited]
Development of deep gratings for wavelength dispersion applications

Yu WJ, Oshita Y, Toyota H, Konishi T, Yotsuya T, Ichioka Y

JAPANESE JOURNAL OF APPLIED PHYSICS 42 ( 6 ) 3434 - 3437 2003.06

DOI
Optical Time-to-Theree-Dimensional(3-D) Space Interconversion System

K. Iwamoto, T. Konishi, K. Itoh, Y. Ichioka

OPTICAL REVIEW 10 ( 3 ) 140 - 145 2003.05 [Refereed]

DOI

Scopus
Verification of spatio-temporal profile of OTDM/WDM signals after time -to- two-dimensional-space conversion system by using CCD camera with ultra-short shutter

Yoshinori Oshita, Tsuyoshi Konishi, Kazuyoshi Itoh, Wanji Yu, Yoshiki Ichioka

OSA Trends in Optics and Photonics Series 88 1551 - 1552 2003
Optical Spectrogram Scope (OSS) for measurement of ultrashort pulse in 1.5 mu m optical communication band

T Konishi, K Tanimura, Y Oshita, Y Wanji, Y Ichioka

OPTICS FOR THE QUALITY OF LIFE, PTS 1 AND 2 4829 865 - 866 2003 [Refereed]
Synthesis of polarization-selective optical components with multi-layer subwavelength structures

WJ Yu, H Kikuta, T Konishi

LITHOGRAPHIC AND MICROMACHINING TECHNIQUES FOR OPTICAL COMPONENT FABRICATION II 5183 184 - 191 2003 [Refereed]
ULTIMATE: Ultrafast all-optical processors for temporal-spatial information processing and conversion

Y Ichioka, T Konishi

OPTICS FOR THE QUALITY OF LIFE, PTS 1 AND 2 4829 411 - 412 2003 [Refereed]
Demonstration of spatial light modulation by using reversible photochemical reaction of bacteriorhodopsin between ground state and K intermediate at room temperature

K. Iwamoto, T. Konishi, Y. Okada-Shudo, K. Itoh, Y. Ichioka

OPTIK 113 ( 7 ) 303 - 308 2002.09

DOI

Scopus

1

Citation

(Scopus)
Angular Selectivity in Nondestructive Readout of Hologram on Photochromic Protein Bacteriorhodopsin

K. Iwamoto, T. Konishi, J. Tanida, Y. Okada-Shudo, Y. Ichioka

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS 41 ( 3 ) 1864 - 1865 2002.03

DOI
Polarization-multiplexed diffractive optical elements fabricated by subwavelength structures

W Yu, T Konishi, T Hamamoto, H Toyota, T Yotsuya, Y Ichioka

APPLIED OPTICS 41 ( 1 ) 96 - 100 2002.01 [Refereed]
2D-image transmission system based on the ultrafast optical data format conversion between temporal signal and 2D-spatial signal

Kyohei Iwamoto, Yukiko Nagasaka, Tsuyoshi Konishi, Jun Tanida, Yoshiki Ichioka

Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest 2 II710 - II711 2001
Ultrafast Optical Routing System Using Correlation Technique in Frequency Domain

Tsuyoshi Konishi, Takashi Kotanigawa, Hideaki Furukawa, Yoshinori Oshita, Osaka Science, Technology Center, Yoshiki Ichioka, NARA National, College of Technology

2001.01

　View Summary

【工学部論文データから移行】
Demonstration of a space-to-time conversion based on a time-space conversion technique among time signals and 2-D space ones

T Konishi, Y Oshita, T Kotanigawa, H Furukawa, Y Ichioka

CLEO(R)/PACIFIC RIM 2001, VOL II, TECHNICAL DIGEST 708 - 709 2001 [Refereed]
Time-Space Photonic Information Processing

Tsuyoshi Konishi, Yoshiki Ichioka, NARA National, College of Technology

38 ( 12 ) 741 - 748 2000.12 [Invited]

　View Summary

【工学部論文データから移行】

CiNii
Time-Space Optical Ultrafast Information Processing

Tsuyoshi Konishi, Yoshiki Ichioka, NARA National, College of Technology

29 ( 8 ) 498 - 499 2000.08 [Invited]

　View Summary

【工学部論文データから移行】
Fabrication of Multilevel Phase Computer-generated Holograqm Elements Based on Effective Medium Theory

Wanji Yu, Osaka Science, Technology Center, Koji Takahara, Osaka Science, Technology Center, Tsuyoshi Konishi, Tsutom Yotsuya, Osaka Science, Technology Center, Yoshiki Ichioka, NARA National, College of Technology

APPLIED OPTICS 39 ( 20 ) 3531 - 3536 2000.07

DOI

Scopus

43

Citation

(Scopus)
Ultra-fast Direct Time-Space Conversion Based on Interferometric Time-Of-Flight Cross Correlation

Tsuyoshi Konishi, Hideaki Furukawa, Yoshiki Ichioka, NARA National, College of Technology

2000.06

　View Summary

【工学部論文データから移行】
Ultra-fast Direct Encoding Of Ultrashort Pulse with 2D-Space Information By Using Optical 2D-Space -to- Time Conversion System

Tsuyoshi Konishi, Yoshinori Oshita, Osaka Science, Technology Center, Yoshiki Ichioka, NARA National, College of Technology

OPTICS IN COMPUTING 2000 4089 111 - 115 2000.06
Ultrafast Optical 2D-Space-To-Time-To-2D-Space Conversion System Based on Spectral Holography

Tsuyoshi Konishi, Kyouhei Iwamoto, Yoshiki Ichioka, NARA National, College of Technology

2000.05 [Invited]

　View Summary

【工学部論文データから移行】
Ultra-fast Time and Space Optical Information Processing

KONISHI Tsuyoshi

rle 28 179 - 180 2000

DOI CiNii
Ultrafast Optical 2D-Space-to-time-to-2D-Space Conversion System based on Spectral Holography

T. Konishi, K. Iwamoto, Y. Ichioka

2000.01 [Invited]
Ultrafast All-Optical Processor for Image Acquisition, Transmission, and Retrieval with Ultra-short Pulse Laser

Tsuyoshi Konishi, Yoshiki Ichioka

1999.11 [Invited]

　View Summary

【工学部論文データから移行】
Ultra-fast Optical Space-to-Time-to-Space Conversion Technique Among Image Signals and Time Sequential Ones

Tsuyoshi Konishi, Yoshiki Ichioka

1999.07 [Invited]

　View Summary

【工学部論文データから移行】
Optical 2D-Space -to- Time Conversion System by using Spectral Holography

Tsuyoshi Konishi, Yoshiki Ichioka

18TH CONGRESS OF THE INTERNATIONAL COMMISSION FOR OPTICS: OPTICS FOR THE NEXT MILLENNIUM, TECHNICAL DIGEST 3749 230 - 231 1999.07
Temporal-Spatial Optical Information Processing and Transmission

Yoshiki Ichioka, Tsuyoshi Konishi

SELECTED PAPER FROM INTERNATIONAL CONFERENCE ON OPTICS AND OPTOELECTRONICS '98 3729 149 - 152 1998.12 [Invited]
Ultra-fast Optical Space-to-Time-to-Space Conversion Technique for Image Transmission

Tsuyoshi Konishi, Yoshinori Oshita, Yoshiki Ichioka

1998.07 [Invited]

　View Summary

【工学部論文データから移行】
Ultra-fast Space-to-Time-to-Space Optical Information Processing and Transmission

Tsuyoshi Konishi, Yoshiki Ichioka

OPTICS IN COMPUTING 98 3490 269 - 272 1998.06
Lens Fabrication Using Gaussian Profile Laser Beam

Keiichiro Kagawa, Tsuyoshi Konishi, Jun Tanida, Yoshiki Ichioka

1997.11

　View Summary

【工学部論文データから移行】
Fabrication of optical components and modules using photofabrication technique

Keiichiro Kagawa, Jun Tanida, Tsuyoshi Konishi, Yoshiki Ichioka

Optical Review 4 ( 6 ) 639 - 642 1997.11 [Refereed]

DOI

Scopus

3

Citation

(Scopus)
Photofabrication in Optical System Fabrication

Keiichirou Kagawa, Tsuyoshi Konishi, Jun Tanida, Yoshiki Ichioka

17TH CONGRESS OF THE INTERNATIONAL COMMISSION FOR OPTICS: OPTICS FOR SCIENCE AND NEW TECHNOLOGY, PTS 1 AND 2 2778 539 - 540 1996.08
Functional Tone Representation in Visual Area Coding Technique(VACT) by Controlling Irradiation Illuminance

Tsuyoshi Konishi, Jun Tanida, Yoshiki Ichioka

17TH CONGRESS OF THE INTERNATIONAL COMMISSION FOR OPTICS: OPTICS FOR SCIENCE AND NEW TECHNOLOGY, PTS 1 AND 2 2778 531 - 532 1996.08
Photofabrication Technique for Optical System Construction

Keiichirou Kagawa, Tsuyoshi Konishi, Jun Tanida, Yoshiki Ichioka

1996.04

　View Summary

【工学部論文データから移行】
Optical implementation of visible gray-image morphology with the visual-area-coding technique

Tsuyoshi Konishi, Shuji Taniguchi, Jun Tanida, Yoshiki Ichioka

Applied Optics 35 ( 8 ) 1234 - 1239 1996.03 [Refereed]

DOI

Scopus

4

Citation

(Scopus)
Visual-Area Coding Technique (VACT): Optical Parallel Implementation of Fuzzy Logic and its Visualization with the Digital Half-Toning Process

Tsuyoshi Konishi, Jun Tanida, Yoshiki Ichioka

Applied Optics 34 ( 17 ) 3097 - 3102 1995.06

DOI

Scopus

16

Citation

(Scopus)
P-OPALS - PURE OPTICAL-PARALLEL ARRAY LOGIC SYSTEM

J TANIDA, T KONISHI, Y ICHIOKA

PROCEEDINGS OF THE IEEE 82 ( 11 ) 1668 - 1677 1994.11 [Refereed] [Invited]

DOI

Scopus

19

Citation

(Scopus)
Pure optical parallel array logic system -An optical parallel computing architecture-

Tsuyoshi Konishi, Jun Tanida, Yoshiki Ichioka

IEICE Trans. Electron. E77C ( 1 ) 30 - 34 1994.01 [Refereed]
Iterative processing on a hybrid optical parallel array logic system with a selectable coherent correlator

Daisuke Miyazak, Tsuyoshi Konishi, Jun Tanida, Yoshiki Ichioka, Sunao Kakizak

Applied Optics 32 ( 17 ) 3053 - 3058 1993.06 [Refereed]

DOI

Scopus

7

Citation

(Scopus)

▼display all

Books and Other Publications

Information Optics and Photonics (Chap.3:Diversity of Optical Signal Processing Led by Optical Signal Form Conversion)

Tsuyoshi Konishi( Part： Contributor)

Springer New York 2010.10 ISBN: 9781441973801
Lasers, Optics and Electro-Optics Research Trends

Tsuyoshi KONISHI( Part： Contributor)

Nova Science Publishers 2007.12
レーザーハンドブック

小西毅( Part： Contributor)

（株）オーム社 2005.04
Optical Information Processing: A Tribute to Adolf Lohmann. In: Ultrafast Temporal-spatial Optical Information Processing, Conversion, and Transmission

T. Konishi, Y. Ichioka( Part： Sole author)

SPIE PRESS 2002.04
Optical Information Processing: A Tribute to Adolf Lohman. In: Ultrafast Temporal-spatial Optical Information Processing, Concersion, and Transmission

Ed. H. J. Caulfield, SPIE PRESS, Washington 2002
"Pure Optical Parallel Array Logic System-An Optical Parallel Computing Architecture-, "

IEICE TRANSACTIONS on ELECTRONICS 1994
Pure Optical Parallel Array Logic System-An Optical Parallel Computing Architecture-,

1994

▼display all

Works

文部科学省産学官連携促進事業

2002

-

2004
JST大阪府地域結集型COE

1997

-

2002

Research Projects

光の非線形伝播を用いたシリコン光デバイス構造の高速計測の基礎研究

日本学術振興会科学研究費助成事業

Project Year :

2022.04

-

2025.03

小西毅, 植之原裕行
低コスト・高品質なミリ波・テラヘルツ帯へのB5G対応高周波数移行技術の研究開発

情報通信研究機構革新的情報通信技術研究開発委託研究 Beyond 5G 研究開発促進事業

Project Year :

2021.10

-

2024.03
超短パルスレーザー応用の先進化が可能で顕微光学系に実装可能な波形制御装置の開発

科学技術振興機構(JST) 研究成果最適展開支援プログラム(A-STEP) 産学共同フェーズ（ステージⅡ）

Project Year :

2017.04

-

2023.03

小西毅
High Quality Optical Sampling in the Electrical Timing jitter Limit Region

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

Project Year :

2019.04

-

2022.03

KONISHI Tsuyoshi

　View Summary

In this study, we attempted to investigate the effect of intensity jitter suppression by a soliton squeezing approach to achieve high quality optical sampling in the electrical timing jitter limit region. When the intensity in the soliton squeezing approach was adjusted, a significant suppression of intensity jitter was observed under conditions where photon noise usually increases, although it did not fall below the shot noise. The improvement of the bit error rate performance was confirmed in the quality evaluation under the same conditions. In addition, we have also studied integration of this method using silicon waveguides and confirmed the basic effect.
超短パルスレーザー応用の先進化が可能で顕微光学系に実装可能な波形制御装置の開発

JST（浜松ホトニクス社との共同研究）

Project Year :

2019

-

　
クロストーク分析に基づき最適化されたマルチキャリアを収容可能な柔軟性のある全光OFDM技術の研究開発

総務省戦略的情報通信研究開発推進事業（国際標準獲得型）

Project Year :

2012.10

-

2015.03

小西毅
Study on Optical Signal Processing in Time-Frequency intermediate domain

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Project Year :

2016.04

-

2019.03

KONISHI Tsuyoshi, CINCOTTI Gabriella, NAGASHIMA Tomotaka, NAGANUMA Tomohiro, YAMASAKI Yu

　View Summary

To achieve a theoretical investigation regarding optical signal processing in time-frequency intermediate domain, we examine an appropriate time-frequency intermediate domain which can accommodate both a packet switching signal and a path switching signal by using a signal quality as an index for optimization. As a result, when a fractional parameter is -0.9, we successfully confirm that it is possible to get much better signal quality in time-frequency intermediate domain with keeping the same occupied bandwidth as that in frequency domain.
In addition, we examine the usefulness of silicon photonics technology to realize the devise in an intermediate domain, which requires an appropriate dispersion characteristic. A numerical analysis and a foundry experimental production device (8 channels) show the dispersion characteristic beyond 800ps/nm, which is sufficient for devises in an intermediate domain. The outcomes of these researches was presented as an invited paper in OFC2019.
未開拓な時間－周波数中間領域での光信号処理に関する基礎研究

日本学術振興会(JSPS) 科学研究費助成事業基盤研究(B)

Project Year :

2016.04

-

2019.03

小西毅
Power Efficient Optical Serial-to-Parallel Conversion using Linear Nyquist pulse generation and Time-Lens Technique

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

Project Year :

2015.04

-

2017.03

KONISHI Tsuyoshi

　View Summary

Power efficient optical serial-to-parallel conversion is investigated as an indispensable frontend subsystem of ultra-wide band systems for bandwidth matching. Here, we pursue a linear technique based on fractional Orthogonal Frequency Division Multiplexing (OFDM) scheme. A fractional OFDM can mediate between Nyquist Optical Time Division Multiplexing (N-OTDM) and OFDM without any nonlinear signal processing and it is expected to incorporate both benefits of the densest serial and parallel features of N-OTDM and OFDM as well as power efficiency of a linear technique. The preliminary operation of serial-to-parallel conversion is successfully verified so that a 10 GHz sine wave serial signal could be optically sampled by triple Nyquist pulses and be converted to three parallel intensity modulated signals at three Fr-OFDM channels under the condition of root mean squared error below 5%.
ナイキストパルスと線形な手法による時間レンズを用いた光シリアル－パラレル変換

日本学術振興会(JSPS) 科学研究費助成事業挑戦的萌芽研究

Project Year :

2015.04

-

2017.03

小西毅
超短光パルス波形の高精度制御・計測技術の実用化開発

科学技術振興機構研究成果最適展開支援プログラム(A-STEP) 産学協同促進ステージハイリスク挑戦タイプ

Project Year :

2013.10

-

2016.03

小西毅
クロストーク分析に基づき最適化されたマルチキャリアを収容可能な柔軟性のある全光 OFDM 技術の研究開発

総務省

Project Year :

2014

-

　
光Ａ／Ｄ変換における自己周波数シフトを用いた光量子化の６ビット化

日本学術振興会(JSPS) 科学研究費助成事業挑戦的萌芽研究

Project Year :

2011.04

-

2013.03

小西毅
光パルスの波形計測技術

科学技術振興機構(JST) 知財活用促進ハイウェイ科学技術コモンズ

Project Year :

2011.10

-

2012.03

小西毅
超短光パルス波形の高安定・高精度制御技術の研究

科学技術振興機構(JST) 研究成果最適展開支援プログラム(A-STEP) FSステージシーズ顕在化タイプ

Project Year :

2011.04

-

2012.03

小西毅
超高速非線形光信号処理のための強度揺らぎ補償に関する基礎研究

日本学術振興会(JSPS) 科学研究費助成事業基盤研究(B)

Project Year :

2009.04

-

2012.03

小西毅
6bit upgrade Optical Quantization for Photonic Analog-to-Digital Conversion using Self-frequency shift

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

Project Year :

2011

-

2012

KONISHI Tsuyoshi

　View Summary

The performance improvement toward 6-bit resolution was investigated for optical quantization using a self-frequency shift. In order to breakthrough performance limitations due to devices and physical phenomena, a different approach form system configuration viewpoint wasexamined in cooperation with stabilization of a self-frequency shift phenomenon. Consequently, reduction of a quantization error as well as 6bit optical quantization was succeeded.
Study on Signal Intensity Stabilization for Ultra-fast Optical Signal Processing

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Project Year :

2009

-

2011

KONISHI Tsuyoshi

　View Summary

In optical communication networks, intensity fluctuation in optical signals is a critical issue through various processing such as transmission, amplification, switching. To solve this issue, we tried to improve performance of an optical limiter in dynamic range of fluctuation and compensation accuracy. In addition, we examined applicability to high repetition signal and nonlinear signal processing. As a result, we achieved a 40-Gb/ s and highly accurate intensity limiting with a single Erbium-Doped Fiber Amplifier(EDFA) for low-power-consumption driving intensity limiting.
A study on ultra-high-speed all-optical forward error correction technique

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Project Year :

2008

-

2010

UENOHARA Hiroyuki, MATHUTANI Akihiro, KONISHI Tsuyoshi, WADA Naoya

　View Summary

The purpose of our research is to create a novel technique for all-optical forward error detection and correction operating at higher than 40Gbps. As an error detection/correction code for all-optical processing, the cyclic Hamming code was selected. Next, to precisely investigate the operation performance of the all-optical divider circuit consisting of SOA-MZI-based optical XOR circuits, we proposed a novel gain model of a SOA. Then, we simulated the operation performance of the optical XOR circuit based on the SOA-MZI-type all-optical switch by using rate equations, and Q-value of the output signal was evaluated. Moreover, we made experiments of all-optical XOR functions and a divider circuit, we achieved the high signal quality of the XOR and preliminary operation of the divider circuit. Finally, we simulated the operation performance of the divider circuit for error detection consisting of SOA-MZI-type XOR and feedback lines by using rate equations. Error detection is obtained in case that the input signal has errors.
Study on optical ad-hoc distortion compensation based on its 2-dimensionality

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Project Year :

2006

-

2008

KONISHI Tsuyoshi
AStudy on Ultrahigh-speed optical forward error detection technique with optical data processing

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Project Year :

2005

-

2007

UENOHARA Hiroyuki, MATSUTANI Akihiro, KONISHI Tsuyoshi, WADA Naoya

　View Summary

We aimed at the realization of all-optical error detection scheme operating at 40Gbps and beyond to overcome the technical issues of the conventional electronic circuits such as operation speed limit and increase of power consumption.
Firstly, we selected the suitable error detection code and optical circuits for the all-optical scheme. On the basis of encoding and decoding error detection symbols processed during passing through optical circuits without buffering and complicated serial-to-parallel and parallel-to-serial conversions and so on, convolutional code and recirculating codes are selected.
In case of convolutional code, check-symbols are generated by processing XOR function between the original information-symbols and the one-bit-delayed information-symbols. And the information and check-symbols are WDM transmitted. In the decoder, the information and check-symbols are WDM demultiplexed, and then XOR function are processed between them, and the original information-symbols are regenerated in case of no errors. After XOR function is processed between the regenerated information-symbols and the transmitted information-symbols, the syndrome is generated. If no "1"'s are included, there are no errors, and if there are "1"'s, errors are detected.
To evaluate the capability of the error detection of the proposed scheme, we simulated the frame error rate, and the improvement of the received optical power of about 2dB could be obtained.
Next, we investigated the performance of the all-optical XOR gate consisting of the SOA-MZI all-optical switch and an optical push-pull circuit, which is one of the most significant components in the error detection circuits. By simulating the rate equation of the semiconductor optical amplifier (SOA) in the all-optical XOR gate, optimized condition for input optical power, power split ratio and time delay of the push-pull optical circuit were derived. Then, 10 and 40Gbps operation of the all-optical XOR gate was performed. Clear eye opening was achieved at 10Gbps, but large degradation of extinction ratio was observed at 40Gbps due to the slow carrier recovery time of the SOA's relative to bit rate.
After that, all-optical error detection operation was investigated analytically and experimentally. In simulations, rate equation and the derived optimized conditions for all-optical XOR gate were used, and the error detection could be verified at 40Gbps. In experiments, 10Gbps operation was performed because of carrier recovery time of 130ps, and extinction ratio of 6dB was achieved in the syndrome for the first time.
高度な光信号処理のための光の多元パラメータに関する共通プラットホーム化の研究

日本学術振興会科学研究費助成事業特定領域研究

Project Year :

2006

　

　

小西毅

　View Summary

本研究課題の目的は、伝送・処理の内容に応じて最適な光の多元パラメータを選択的に利用するための信号形態変換技術について検討し、これを用いた光信号処理への応用を展開することである。
マルチレベルの強度を持つM-ary ASK信号を用いた多重伝送方式は同じビットレートのバイナリ信号に比べて利用帯域が狭いため,伝送路における波長利用効率の向上が可能であるとして注目されている。我々はこれまでに,多重化されたマルチレベル信号(M-ary ASK信号)からバイナリ信号への全光信号分離を実現するために,ファイバ内の自己周波数シフトによる強度-波長変換と光インタコネクションを用いた手法を提案している。本稿では,提案する全光M-ary ASK信号分離器の実験的検証を行った。原理確認実験により,全光M-ary ASK信号分離器を用いて25Gb/sに相当する4-ASK信号から2つのOOK信号への分離が可能であることを確認した。
情報の統合性、耐雑音性などの観点から,現在の光通信の中での処理や伝送で最も主流の信号形態は,強度変調に基づくディジタル時系列光信号である.次世代のフォトニックネットワークにおいて信号を重畳する信号媒体である。今後、光信号の処理の高速化には、現在のインフラストラクチャを有効に活用し,かつ現在の処理の機能性を可能な限り維持したアプローチが望まれる.本研究の内容は、その実現可能性を実際の実験を通して明らかにしたものであると評価される。
・参照資料:IEICE Transactions on Electronics, vol.E90-C, No.2, pp.405-408(2006,Invited paper)
・:IEICE Transactions on Electronics, vol.E90-C, No.2,pp.479-480(2006)
Time-resolved spectroscopy of a specific, single fluorescent protein molecule in a living cell

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Project Year :

2005

-

2006

ITOH Kazuyoshi, KONISHI Tsuyoshi, MATSUNAGA Sachihiro, OZEKI Yasuyuki

　View Summary

In the recent post-genome biological research field, there is a growing demand for exploring the function, mechanism, interaction, and network of proteins, which are the physical basis of life. In particular, it is of great interest to analyze the interactions among protein molecules by use of low-invasive visualization tools.
The objective of this research was to provide optical means for analyzing the interactions among protein molecules. The first target was to improve the fluorescence yield of fluorescent proteins through the investigation on the fluorescence mechanisms of fluorescent proteins with the femtosecond time-resolved micro-spectroscopy. Through the experiment, we succeeded in the two-photon fluorescence conversion of a fluorescent protein Kaede. This technique turned out to be a powerful tool for exploring the function of a single organelle in a living cell. Then we realized that, by irradiating dual-wavelength femtosecond pulses, a strong optical signal is generated through the four-wave mixing process due to electronic optical nonlinearity, which we called stimulated parametric emission, SPE. We constructed a SPE microscopy system, which was found to be a useful tool for the label-free observation of living cells. We also succeeded in (a) the sensitive detection of SPE signals by use of a spectral interferometric technique, (b) the application of the SPE microscopy to the three-dimensional profiling of refractive index distribution of non-biomedical samples, and (c) the development of a novel technique of dispersion compensation of a microscope objective lens for its application to ultrafast nonlinear optical microscopy using ultrashort optical pulses in few-cycle regime. To summarize, through these achievements, we have successfully developed and demonstrated novel approaches for exploring interactions of protein molecules by using femtosecond laser pulses.
光時空間変換に基づく超高速光信号処理による全光パケットルーティングの基礎研究

日本学術振興会科学研究費助成事業若手研究(A)

Project Year :

2004

-

2006

小西毅

　View Summary

本研究の目的は、次世代のフォトニックネットワークにおける基本的なパケット転送処理を並列処理のアプローチから全光で行う技術を実現することである。パケットは、信号の行き先を指定するアドレス(ラベル)と信号部分であるペイロードから構成される。具体的には、超高速パケット転送のために必要なラベル認識、経路スイッチング、信号再生を統合した超高速全光パケットルーティング処理の並列処理アーキテクチャによる実現を目指している。最終年度である本年度は、研究成果をまとめるにあたり、処理機能の品質評価を中心に下記の項目に対して検討を行った。
1)経路スイッチング機能
これまで研究を行ってきた超高速光アナログ/ディジタル変換の構成要素であるファイバ内の自己周波数シフトを用いた光マルチ閾値処理を中心に実際の光通信で用いられる10Gbpsの信号を用いた品質評価を行った。その結果、非常に開口のクリアに開いたアイパターンが得られ、処理の品質の高さを確認した。さらに、ビットエラーレートを計測することにより、最終的にエラーフリーの実験結果を得ることに成功した。
2)パケット信号再生機能
空間フィルタリングを用いた光符号化処理を中心に検討を行った。入力信号に応じて符号を付け替える符号変換機能の基本機能を検討した。基本実験として、入力信号(元信号)を認識し、その信号に対応した出力強度(新しい符号)に変換する実験を行い、良好な結果を得た。
3)ラベル抽出処理機能
ラベル認識技術を応用した信号処理による抽出と超高速スイッチングによる抽出を運用する際に信号を一時待機させることが必要であることを念頭に、光バッファメモリの検討を進めた。その結果、時空間変換を用いた方法により、2ピコ秒間隔のビット信号の超高速記録が可能であることを実験的に確認した。
潜在顧客としての高校生に対するサービス提供におけるニーズとシーズおよびその事後評価に関する調査研究

大阪大学工学部／大学院工学研究科フロンティア研究機構

Project Year :

2005

-

　
光時空間変換に基づく超高速光信号処理による全光パケットルーティングの基礎研究

文部科学省

Project Year :

2005

-

　
潜在顧客としての高校生に対するサービス提供におけるニーズとシーズおよびその事後評価に関する調査研究

大阪大学工学部／大学院工学研究科フロンティア研究機構

Project Year :

2004

-

　
超高速光スペクトログラムスコープの開発

文部科学省

Project Year :

2004

-

　
超高速光ラベル認識における符号化／復号処理に関する研究

独立行政法人情報通信研究機構

Project Year :

2004

-

　
再帰的なフォトクロミック過程を用いた自己誘導型光パルス発生機構に関する基礎研究

Project Year :

2003

-

　
超高速光スペクトログラムスコープの開発

文部科学省

Project Year :

2003

-

　
BASIC STUDY FOR SELF-INDUCED OPTICAL PULSE GENERATION USING RECURSIVE PHOTOCHROMATIC PROCESS

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

Project Year :

2001

-

2003

KONISHI Tsuyoshi

　View Summary

The objective of this research is development of self-induced optical pulse generation using recursive photochromatic process. In general, a living thing is considered to be a kind of the optimized system. Applying it in engineering effectively, development of a novel and eco-friendly functional material is expectable. In this project, the optical receptiveness protein which exists also in our eyes is taken up. Optical receptiveness protein changes the form by the difference in the color of light (isomerization). It returns to the form of a basis through the process of some isomerization. Focusing on this recursive optical isomerization of the optical receptiveness protein, the phenomenon under existence of the multi-caolor light as environment is examined paying attention to its various behavior.
For the purpose, we have proposed the novel method for modulation of light using the recursive photochromatic process of optical receptiveness protein. To verify the proposed method, we adopted "bacteriorhodopsin" as an optical receptiveness protein. As a result of experimental verification, we confirmed that the proposed method function successfully in bacteriorhodopsin. To make a full use of various properties of bacteriorhodopsin in this method, we delved into the this recursive optical isomerization of bacteriorhodopsin from ultra-fast regime to slow one.
From the results of this research, we can obtain the important knowledge, with which the proposed method would become a new approach for application of bio-materials (ex. optical pulse generation).
再帰的なフォトクロミック過程を用いた自己誘導型光パルス発生機構に関する基礎研究

Project Year :

2002

-

　
Scalogram Measurement System of Ultrashort Optical Pulse Using Femtosecond Pulse Laser

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Project Year :

2001

-

2002

ICHIOKA Yoshiki, KONISHI Tsuyoshi, OSIDA Yoshihiro

　View Summary

The object of this research is to develop the new optical method that can directly and simultaneously measure and analyze the relation among time, space and temporal frequency of ultrashort optical pulse as a scalogram, and to design and construct a new optical system capable of realizing such ultrafast measurement and analysis of scalogram.
For this purpose, we designed and constructed a new optical system which was able to achieve multi-resolutional analysis by using wavelet transform. In the developed system, wavelet transform of an ultrashort pulse is optically achieved, and retrieval of profiles of various signals is attained with electronic post calculation. To verify the ability of the developed system, we attempted several experiments.
Through experimental results, we confirmed that the proposed system can measure scalogram of an femtosecond ultrashort pulse. To demonstrate the capability of the constructed system, we acquire several multi-resolutional scalograms, changing either temporal resolution or spectral one. From the results of this research, we can obtain the important knowledge that the developed system would work as an ultrafast processor for scalogram and would be useful tool for measurement and analysis of ultrashort optical pulses.
Research of Ultrafast Photonic Time-Space Conversion and Transmission

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Project Year :

2000

-

2001

ICHIOKA Yoshiki, KONISHI Tsuyoshi, TANIDA Jun, OSHIDA Yoshihiro

　View Summary

The objective of this project research is a development of a system for a Ultrafast photonic time-Space conversiOn and transmission. Increasing demands for multi-media information in a networked society requires an optical fiber communication system with ultra-high transmission capaqity and ultrafast processing system. Since data in the advanced networks are ultrafast ones, it is necessary to develop an ultra fast optical information processing system whose processing speed is over Tbps, at least. One promissing approach is a paralle processing to realize such an ultrafast information proces slng.
For this purpose, we have proposed the novel optical ultrafast two-dimensional space -to- time -to- two-dimensional space conversion techuique among image signals and time sequential ones with an ultra-fast pulse laser. By using the proposed technique, we constructed a femtosecond pulse optical information processing system and demonstrated fundamental functions of the optical routing system for an ultrafast packet switching. As a result of experimental verification, we confirmed that the proposed technique is compatible with the current ultrafast optical fiber cornmunication system. To demonstrate the capability of the constructed system, we implemented the ultrafast header recognition whose processing rate is over 600Gbps. From the results of this research, we can 6btain the important knowledge, with which the proposed technique would become an ultra fast optical infonnation processing sYstem in the next generation of networked society.
Nonlinear spatio-temporal photonicswith tera optical pulse

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for University and Society Collaboration

Project Year :

1999

-

2001

ITOH Kazuyoshi, KONISHI Tsuyoshi, TANIDA Jun, ICHIOKA Yoshiki, HANGYO Masanori, WATANAE Wataru

　View Summary

The purpose of this research was to establish the optical technology of nonlinear spatio-temporal photonics with ultrashort laser pulses in collaboration with Venture Business Laboratory and COE Osaka. "Development of basic tera optical information technologies" The results obtained in the research term are listed below.
Induction of refractive index change by self-trapped filaments
We induced the refractive index change by using the filaments formed by femtosecond laser pulses (800nm) focused into silica glass. The diameter of the area of refractive index change was approximately 2 microns and the length was several ten toseveral hundred mm. The maximum refractive index change was 0.01.
Optical seizing and mering of voids
We focused the ultrashort laser pulses by high-NA objectives and formed voids inside glass. We succeeded in moving the void by approximately 5 microns along the optical axis by repeating the irradiation of the ultrashort laser pulse and translation of the focusing lens. We also succeeded in merging the two voids into one.
Spectrotomography
We built a non-dispersive and a dispersive coherence spectrotomography systems that measure simultaneously the spatial and spectral information inside the object. The dispersive coherence spectrotomograpy system was evaluated by applying the system to small shrimps. We succeeded in obtaining clear spectrotomography image of the tail of shrimp.
Ultrafast spatio-temporal information processing
We demonstrate fundamental functions for ultrafast optical routing by using an elemental part of an ultrafast optical technique for conversion of time to two-dimensional space. A preliminary experimental result shows that recognition of header signals can be achieved at a rate of more than 600 Gbytes/s.
Research of Femtosecond Pulse Optical Information Processing System

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A).

Project Year :

1999

-

2000

ICHIOKA Yoshiki, KONISHI Tsuyoshi, TANIDA Jun, OSHIDA Yoshihiro

　View Summary

The objective of this project research is a development of a femtosecond pulse optical information processing system. Increasing demands for multimedia information in a networked society requires an optical fiber communication system with ultra-high transmission capacity and ultrafast switching system. To realize such an ultrafast information processing, it is necessary to develop an ultra fast optical information processing system whose processing speed is over Tbps, at least.
For this purpose, we have proposed the novel optical ultrafast two-dimensional space-to-time-to-two-dimensional space conversion technique among image signals and time sequential ones with an ultra-fast pulse laser. By using the proposed technique, we constructed a femtosecond pulse optical information processing system and demonstrated the optical 2D-space-to-time-to-2D-space conversion system. As a result of experimental verification, we confirmed that the proposed : technique is compatible with the current ultrafast optical fiber communication system. To demonstrate the capability of the constructed system, we implemented the character image transmission and transform.
From the results of this research, we can obtain the important knowledge, with which the proposed technique would become an ultra fast optical information processing system in the next generation of networked society.
Research of Spatio-Temporal Developing Information Processing Based on Optical Feedback

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B).

Project Year :

1999

-

2000

TANIDA Jun, KONISHI Tsuyoshi

　View Summary

This study aims to develop a new method for spatio-temporal optical information processing based on an optical feedback system. For the purpose, an experimental system for spatio-temporal developing information processing, a fixing method for spatio-temporal information, and an spatio-temporal information compression are investigated. The obtained results are as follows :
1. As an instance of the optical feedback, a feedback system based on two dimensional affine transformations is modeled, and an experimental test-bed is constructed using a TV feedback system.
2. To control fractal generation by the affine transform feedback system, a mother function for the iterated-function- system is developed and the effectiveness is confirmed.
3. A method for two dimensional random pattern generation is considered by the affine transform feedback system. Simulation results verify the applicability of the method to stream cipher.
4. Spatial division and wavelength separation methods are developed to increase the processing reproducibility by the optical feedback system. Application to two dimensional random pattern generation confirms the effectiveness.
5. For the high-precision calculation technique based on the fixed point theorem and the interval arithmetic, parameters on calculation precision and processing efficiency are derived. The setup protocol for the parameters are considered.
6. A conversion method between two dimensional spatial images and ultrafast temporal signals is developed using the time-to-space conversion and the spatial frequency multiplexing techniques.
7. An experimental system with an optically-addressed spatial light modulator verifies the principle of the spatio- temporal conversion method and the correct operation is confirmed.
光時空間情報変換を用いた超短光パルスのスペクトログラム計測に関する基礎研究

日本学術振興会科学研究費助成事業奨励研究(A)

Project Year :

1999

-

2000

小西毅

　View Summary

本研究では,高調波発生の方法を用いずに時間信号である超短パルス光から信号のスペクトログラムに対して直接的に振幅情報のみならず位相情報を同時に得る方法の実現を目的としている。さらに、光情報処理技術と超短パルス光技術を融合することによるウェーブレット変換の特徴であるマルチリゾリューショナル解析などの信号処理の考え方を超短光パルス計測技術への導入を検討する。本年度は、提案する光スペクトログラム計測の原理に基づき試作した計測システムの計測能力の向上および計測システムの自由度について検討を行った。本年度の研究により得られた成果・知見は以下の通りである。
1.一般に、超高速時間分解分光計測では繰り返し計測が基本とされているため、リアルタイム計測は困難である。作製したパルス整形システムからの既知の微弱信号光をリアルタイムに計測することにより、本試作システムによる撮像デバイスの撮像時間性能にのみ依存したリアルタイム計測が可能であることを確認した。現在、撮像時間が50ピコ秒以下の撮像デバイスが実現可能であるため、時間分解分光計測におけるシングルショット計測が可能である。
2.計測システムで用いる時間-周波数変換フィルタを調整することにより、時間分解能を数百フェムト秒から数ピコ秒まで自由に変化させた計測の実現を確認した。また、このとき波長分解能は、数ナノメートルからサブナノメートルまで変化することも確認した。
3.試作した超短光パルスのスペクトログラム計測システムの検討を行い、提案する方法による超短光パルス計測システムとして今後展開が可能な以下の具体的な項目の抽出を行った。
1)時間-周波数変換フィルタへの様々な信号処理の導入
2)高速撮像デバイスを用いたシングルショット計測の実現
3)実装技術を導入する高い計測精度を持つ実用計測システムの実現
Three-dimensional microphotonic optical systems

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B).

Project Year :

1998

-

2000

ITOH Kazuyoshi, WATANABE Wataru, KONISHI Tsunoshi

　View Summary

The purpose of this research was 1) the investigation of the mechanism of refractive index changes in photorefractive crystal and Ge-doped silica glass that are induced by ultrashort laser pulses and and 2) fabrication and evaluation of microstructures inside glass such as the waveguides, dividers, couplers and small Bragg reflectors. The results obtained in the research term are listed below.
1) Induction of refractive index change by self-trapped filaments
We induced the refractive index change by using the filaments formed by femtosecond laser pulses (800 nm) focused into the silica glass. The diameter of the area of refractive index change was approximately 2μm and the length was several ten to several hundred mm. The maximum refractive index change was 0.01.
2) Fabrication of birefringent microphotonic elements
By mechanically translating the filament formed by the ultrashort laser pulses, we fabricated optical waveguides with negligible loss (core diameter ; 2μm, length ; 2 mm). We found that the waveguides had birefringence and evaluated the birefringence by making a grating with these waveguides.
3) Optical seizing and mering of voids
We focused the ultrashort laser pulses by high-NA objectives and formed voids inside glass. We cleaved the glass inside which voids are formed and observed the void by scanning electron-beam microscope. We identified the voids as the vacancies inside the glass. We succeeded in moving the void by approximately 5μm along the optical axis by repeating the irradiation of the ultrashort laser pulse and translation of the focusing lens. We also succeeded in merging the two voids into one.
These results do not unfortunately lead to the direct elucidation of the mechanism. However, they provide strong clues to the interpretation of the mechanism of refractive index change in silica glass.
A part of this work has been published in Optics Letters and is under preparation for publication. Two patents related to the movement and merger of voids and formation of birefringent optical waveguides are under application by the help of Japan Science and Technology Corporation. The results of movement and merger of voids are picked up by the technical magazine, Laser Focus World (Vol.37, Issue 2, 2001).
Research on spectrotomography inside skin by supercontinuum white light

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B).

Project Year :

1998

-

2000

ITOH Kazuyoshi, WATANABE Wataru, KONISHI Tsunoshi

　View Summary

The purpose of this research work is to develop a method to generate stable supercontinuum white-light sources and to prove *e feasibility of reconstructing spectrotomographic images inside human skin using the supercontinuum white-light sources. The results obtained in the research
are listed below.
1) Array of supercontinuum white-light sources
To generate stable supercontinuum white-light sources by using the Ti : Sapphire laser light, we attempted to generate an array of supercontinuum white-light sources by use of a microlens array and succeeded in generating approximately 100 supercontinuum white-light sources simultaneously. We also investigated the statistical characteristics of formation of the filaments that generate the supercontinuum white-light sources by time-resolved Schlieren-optics observation.
2) Study of spatial coherence of supercontinuum white-light
The optical coherence between the elementary sources in the array of supercontinuum white-light sources has been studied and extremely high spatial coherence was measured. We also showed experimentally that the high spatial coherence between the lights generated in two filaments of the multiple filaments that are formed in the liquid and solid by a single beam of the Ti ; Sapphire ultrashort lasers pulses.
3) Spectrotomography
We built a non-dispersive and a dispersive coherence spectrotomography systems that measure simultaneously the spatial and spectral information inside the object. The systems make use of the supercontinuum white-light source as a light source. We evaluated the systems in terms of spatial resolution limit of layered media, spectral resolution, signal-to-noise ratio. The dispersive coherence spectrotomograpy system was evaluated by applying the system to small shrimps. We succeeded in obtaining clear spectrotomography image of the tail of shrimp. Due to the instability of supercontinuum white-light source, however, the application experiments to human skin could not committed.
The results of this research were partly published (Optical Review ; 1999, Japanese Journal of Applied Physics ; 2001) and review papers were also published (Optical Review ; 2000, Japanese Journal of Optics ; 2000). The rest of the results are under preparation for publication.
Fundamental Research of Temporal and Spatial Optical Information Processing

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

Project Year :

1997

-

1999

ICHIOKA Yoshiki, KONISHI Tsuyoshi, TANIDA Jun, ITOH Kazuyoshi

　View Summary

The objective of this project research is a fundamental research of temporal and spatial optical information processing. Increasing demands for multi-media information in a networked society requires an optical fiber communication system with ultra-high transmission capacity and ultrafast switching system. To realize such an ultrafast information processing system, it is necessary to develop an optical ultrafast interface system between temporal signal and spatial signal.
For this purpose, we have proposed the novel optical ultrafast two-dimensional space-to-time-to-two-dimensional space conversion technique among image signals and time sequential ones with an ultra-fast pulse laser. To verify the proposed technique, we constructed the experimental system. As a result of experimental verification, we confirmed that the proposed technique is compatible with the current ultrafast optical fiber communication system. To demonstrate the capability of the constructed system, we implemented the character image transmission and transform. By using the shaped pulse corresponding to the character image, we can obtained the character image at a ultra-high speed. A rate of transform is over 3 Tbps.
From the results of this research, we can obtain the important knowledge, with which the proposed technique would become an ultrafast temporal-spatio photonic processing technique for multimedia information in the next generation of networked society.
STUDY ON ARCHIIECTURES AND CONSTRUCTION TECHNIQUES OF OPTICAL COMPUTERS

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

Project Year :

1994

-

1996

ICHIOKA Yoshiki, KONISHI Tsuyoshi, TANIDA Jun, ITOH Kazuyoshi

　View Summary

Purposes of this research are to propose a new system architecture of optical/electronical parallel information processing system, combining optical information processing and electronic technology and to construct its prototype system. Results of the research are as follows :
(1) We proposed the new optical parallel computing technique called the visual-coding technique (VACT), making good use of visualization of information in the course of image processing. We considered the optical method realizing the proposed VACT and constructed an actual experimental system. We experiment optical parallel fuzzy processing and parallel visual image processing based on mophology. Experimental results showed usefulness of the VACT.VACT is the optical parallel computing technique in which image information is utilized not only as the symbol but also as meaningful signals. VACT would be an useful key technology for developing the visual man-machine interface in the information society in future.
(2) We proposed a new architecture of optical/electronical parallel computing system called OAL-NC (Optical Array Logic Network Computing). OAL-NC is the new architecture of parallel computing system in which localized parallel processing is attained by an electronical method and global parallel processing and signal interconnections are implemented by an optical method. We considered two implementing methods realizing OAL-NC,that is, PLD (Programmable Logic Device) and MPE (Multi-Process Enbodiment) methods. After comparing processing capabilities of both methods, we constructed the prototype system of MPE type which would be promising as a future parallel processing system and capable of constructing with simple hardwares. In the prototype system, 16 transputers T-425 and 16x16 processing elements are equipped with in electronical processing portion so as to process 16x16 pixels in parallel. We constructed interfaces among optical processing elements, PD and LED arrays, and parallel control circuits. Data transfer rate of 150 Kframe/sec in the electronic portion, and data transferring time of 126.1 mus among transputers are attained. These values are enough to evaluate abilities of cooperative processing by optics and electronics. We also designed an optical system of multiple-discrete correlator and constructed an actual system.
(3) We developed a new automatic lens design algorithm modifying ALSIE (Automatic Lens Design using Inequalities) for designing multiple imaging systems. In this algorithm, we adopt wave-front aberrations as criterions in the course of automatic lens designing. Using the developed algorithm, we designed GRIN lens array for a multiple-discrete correlator.
フォトニックネットワークにおける光処理ルーティングに関する研究

その他の研究制度
時空間光情報処理に関する研究

その他の研究制度
光コンピュ-タの構成法並びに構成技術に関する研究

その他の研究制度

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Misc

Photonic high-frequency band migration technology for high-quality ultra-wideband arbitrary waveform generation

小西毅, 中山自然, 辻知樹, 西岡隼也, 赤松孝俊, 小西良明, 中村誠希, 望月敬太

電子情報通信学会技術研究報告(Web) 124 ( 346(PN2024 40-59) ) 2025

J-GLOBAL
A Study of Accuracy of High Frequency Signal Monitoring for RoF without Frequency Conversion

阿津柊太, 辻知樹, 中山自然, 小西毅

電子情報通信学会技術研究報告(Web) 124 ( 346(PN2024 40-59) ) 2025

J-GLOBAL
The number of measurements dependency on receiving quality in self-interference coherent detection

喜早亨伍, 中山自然, 小西毅

電子情報通信学会技術研究報告(Web) 124 ( 346(PN2024 40-59) ) 2025

J-GLOBAL
Optical path modeling using changes in light guiding in an inverse tapered silicon thin-wire waveguide optical coupler

中山自然, 大串孝一朗, 舟槻惇平, 小西毅

電子情報通信学会技術研究報告(Web) 124 ( 346(PN2024 40-59) ) 2025

J-GLOBAL
Quality evaluation of high-frequency sampling signals using optical high-frequency migration technology

大串孝一朗, 中山自然, 小西毅

電子情報通信学会技術研究報告(Web) 124 ( 346(PN2024 40-59) ) 2025

J-GLOBAL
Optical coupling alignment measurement into a silicon waveguide by analyzing spectral changes of probe pulse after propagating through the waveguide.

舟槻惇平, 川浪礼士, 小西毅

電子情報通信学会技術研究報告(Web) 123 ( 349(PN2023 47-68) ) 2024

J-GLOBAL
High frequency measurement using discrete wavelength-time-wavelength mapping

辻知樹, 牧野将之, 小西毅

電子情報通信学会大会講演論文集(CD-ROM) 2023 2023

J-GLOBAL
Optical Sampling Pulse Generation for Wavelength Division Multiplexing Interleaving

中山自然, 牧野将之, 藤村早希, 小西毅

電子情報通信学会大会講演論文集(CD-ROM) 2023 2023

J-GLOBAL
Photonic Migration Technique to High Frequency Regime for Beyond 5G Next-Generation Communications

小西毅

光学 52 ( 11 ) 2023

J-GLOBAL
Down Conversion Less Monitoring Method for Beyond 5G RF Signal in RoF

辻知樹, 中山自然, 小西毅

電子情報通信学会技術研究報告(Web) 123 ( 267(PN2023 37-46) ) 2023

J-GLOBAL
Enhancement of measurement sensitivity in an internal structure modeling method for silicon waveguides using nonlinear spectral change

倉橋朋也, 牧野将之, 上川涼平, 小西毅

電子情報通信学会技術研究報告(Web) 121 ( 386(PN2021 52-86) ) 2022

J-GLOBAL
Examination of high-frequency region migration using chromatic dispersion

牧野将之, 海堀祐太, 小西毅

電子情報通信学会大会講演論文集(CD-ROM) 2022 2022

J-GLOBAL
Investigation of noise suppression method using soliton squeezing

上川涼平, 山崎佑, 小西毅

電子情報通信学会大会講演論文集(CD-ROM) 2022 2022

J-GLOBAL
A Study on Waveform Distortion in the Time Direction of Photonic Assisted Arbitrary Waveform Generator by Wavelength Dispersion

西岡隼也, 赤松孝俊, 小西毅, 牧野将之, 中村誠希, 小西良明

電子情報通信学会大会講演論文集(CD-ROM) 2022 2022

J-GLOBAL
Data aggregation technique for high-frequency band migration using chromatic dispersion control

牧野将之, 辻知樹, 西岡隼也, 中村誠希, 赤松孝俊, 小西良明, 鈴木巨生, 小西毅

電子情報通信学会技術研究報告(Web) 122 ( 242(PN2022 21-30) ) 2022

J-GLOBAL
PSK signal reception without a local oscillator based on fractional Fourier transform

小西毅, 上川涼平, 山崎佑

電子情報通信学会技術研究報告(Web) 120 ( 308(CS2020 75-78) ) 2021

J-GLOBAL
A Study on Optical Quantization and Coding Scheme by Soliton Self-Frequency Shift using Frequency Filter with Void Grids

西岡隼也, 赤松孝俊, 斧原聖史, 鈴木巨生, 小西毅

電子情報通信学会大会講演論文集(CD-ROM) 2021 2021

J-GLOBAL
Waveform Reconstruction Accuracy Verification of Optical Quantization and Coding Scheme using Frequency Filter with Void Grids

赤松孝俊, 西岡隼也, 斧原聖史, 鈴木巨生, 小西毅

電子情報通信学会大会講演論文集(CD-ROM) 2021 2021

J-GLOBAL
Structure modeling of silicon waveguide devices using nonlinear spectral broadening

倉橋朋也, 牧野将之, 上川涼平, 小西毅

電子情報通信学会技術研究報告(Web) 121 ( 237(PN2021 26-31) ) 2021

J-GLOBAL
Verification of self-phase modulation-based nonlinear optical device using Si₃N₄ waveguide

高橋考二, 高橋考二, 石原大輝, 海堀祐太, 井上卓, 小西毅

電子情報通信学会技術研究報告 119 ( 403(EMT2019 74-92) ) 2020

J-GLOBAL
Investigation of Phase Modulation Signal Detection Using Fractional Fourier Transform

上川涼平, 山崎佑, 小西毅

電子情報通信学会大会講演論文集(CD-ROM) 2020 2020

J-GLOBAL
Examination of low-noise pulse train generation using optimization algorithm

山崎佑, 小西毅

電子情報通信学会大会講演論文集(CD-ROM) 2020 2020

J-GLOBAL
Spectral efficiency evaluation in optical fractional OFDM

山崎佑, 永島知貴, CINCOTTI Gabriella, 清水智, 和田尚也, 植之原裕之, 小西毅

電子情報通信学会技術研究報告 118 ( 397(EMT2018 65-116) ) 2019

J-GLOBAL
Extending transmission distance using optical fractional OFDM

山崎佑, 永島知貴, CINCOTTI Gabriella, 清水智, 和田尚也, 植之原裕之, 小西毅

電子情報通信学会技術研究報告 119 ( 16(PN2019 1-6)(Web) ) 2019

J-GLOBAL
Intensity jitter suppression and quantum fluctuation for resolution improvement of photonic analog-to-digital conversion

小西毅, 山崎佑

電子情報通信学会技術研究報告 117 ( 473(PN2017 91-111) ) 2018

J-GLOBAL
光A/D変換の高分解能化に向けたソリトン自己周波数シフトを用いたASE雑音抑制効果のパルス幅依存性の検討

山崎佑, 小西毅

電子情報通信学会大会講演論文集(CD-ROM) 2018 2018

J-GLOBAL
ASE noise suppression in amplified light source for probe light

山崎佑, 永島知貴, 平岡幹基, 小西毅

Optics & Photonics Japan講演予稿集(CD-ROM) 2017 2017

J-GLOBAL
C-3-37 Operating Performance of Interleaver for 40GHz Optical Pulses for All-Optical AD Converter

Uenohara Hiroyuki, Konishi Tsuyoshi, Hasegawa Makoto

Proceedings of the IEICE General Conference 2015 ( 1 ) 161 - 161 2015.02

CiNii
B-10-22 Interconnect Experiment between Optical Sampling and Quantization for Optical Analog-to-Digital Conversion

Hasegawa Makoto, Konishi Tsuyoshi

Proceedings of the IEICE General Conference 2014 ( 2 ) 390 - 390 2014.03

CiNii
Study on Transmission Technology using Optical Fractional Discrete Fourier Transform Device for Optical OFDM

Konishi Tsuyoshi, Cincotti Gabriella, Kodama Takahiro, Murakawa Takuya, Nagashima Tomotaka, Hasegawa Makoto, Shimizu Satoshi, Wada Naoya

113 ( 455 ) 23 - 27 2014.03

　View Summary

We examine characteristics of an optical fractional discrete Fourier transform device to develop flexible transmission technology for Optical Orthogonal Frequency Division Multiplexing (OFDM). An optical fractional discrete Fourier transform (FR-FFT) device can provide a unique orthogonal basis for sub-carriers of optical OFDM. Optical FR-FFT based Transmission property is examined in simulation by using time-frequency analysis.

CiNii
Study on Near-Infrared Range All-Optical Limiter Using Photonic Crystal Fiber

MURAKAWA Takuya, NAGAO Ryosuke, KONISHI Tsuyoshi

Technical report of IEICE. LQE 113 ( 395 ) 273 - 276 2014.01

　View Summary

We investigate a near-infrared range all-optical limiter to stabilize peak power fluctuations of near-infrared optical pulses. A near-infrared optical pulse can induce peak-power-dependent spectral pattern changes after passing through a photonic crystal fiber (PCF), which can provide zero-dispersion condition in the near-infrared band. This spectral change enables to stabilize the power of center wavelength components. The experimental result shows less than 0.84dB suppression effect for a 3.22dB input power fluctuation.

CiNii
Study on Near-Infrared Range All-Optical Limiter Using Photonic Crystal Fiber

MURAKAWA Takuya, NAGAO Ryosuke, KONISHI Tsuyoshi

113 ( 396 ) 273 - 276 2014.01

　View Summary

We investigate a near-infrared range all-optical limiter to stabilize peak power fluctuations of near-infrared optical pulses. A near-infrared optical pulse can induce peak-power-dependent spectral pattern changes after passing through a photonic crystal fiber (PCF), which can provide zero-dispersion condition in the near-infrared band. This spectral change enables to stabilize the power of center wavelength components. The experimental result shows less than 0.84dB suppression effect for a 3.22dB input power fluctuation.

CiNii
Study on Near-Infrared Range All-Optical Limiter Using Photonic Crystal Fiber

MURAKAWA Takuya, NAGAO Ryosuke, KONISHI Tsuyoshi

113 ( 397 ) 273 - 276 2014.01

　View Summary

We investigate a near-infrared range all-optical limiter to stabilize peak power fluctuations of near-infrared optical pulses. A near-infrared optical pulse can induce peak-power-dependent spectral pattern changes after passing through a photonic crystal fiber (PCF), which can provide zero-dispersion condition in the near-infrared band. This spectral change enables to stabilize the power of center wavelength components. The experimental result shows less than 0.84dB suppression effect for a 3.22dB input power fluctuation.

CiNii
B-10-37 Spectral compression ofself-frequency shifted signals toward 7-bit photonic A/D conversion

Satoh Takema, Nagashima Tomotaka, Itoh Kazuyoshi, Konishi Tsuyoshi

Proceedings of the IEICE General Conference 2013 ( 2 ) 368 - 368 2013.03

CiNii
B-12-1 Reso lution inprovement o f all-optical quantiZation based on so liton self frequency shiftusking dual dispersion devices

Nagashima Tomotaka, Satoh Takema, Catalin Petre, Itoh Kazuyoshi, Konishi Tsuyoshi

Proceedings of the IEICE General Conference 2013 ( 2 ) 442 - 442 2013.03

CiNii
B-10-91 7-bit optical quantization using phase modulator based spectral compression for photonic analog-to-digital conversion

Satoh Takema, Van de Walle Aymeric, Itoh Kazuyoshi, Konishi Tsuyoshi

Proceedings of the Society Conference of IEICE 2012 ( 2 ) 273 - 273 2012.08

CiNii
B-12-12 6-bit resolution performance of dual rail all-optical quantization at 10 GS/s

Nagashima Tomotaka, Satoh Takema, Van de Walle Aymeric, Itoh Kazuyoshi, Konishi Tsuyoshi

Proceedings of the Society Conference of IEICE 2012 ( 2 ) 299 - 299 2012.08

CiNii
6-bit optical quantization using phase modulator based spectral compression

SATOH Takema, VAN DE WALLE Aymeric, ITOH Kazuyoshi, KONISHI Tsuyoshi

112 ( 195 ) 11 - 15 2012.08

　View Summary

We report the simulation result of 6-bit optical quantization using phase modulator based spectral compression. Recently, the high-speed analog-to-digital (A/D) conversion without the limitation of electrical processing speed is required in a wide variety of broadband application. Previously, we have proposed 6-bit optical quantization using soliton self frequency shift (SSFS) and spectral compression. In the spectral compression, we used dispersion in a single mode fiber (SMF) and the self-phase modulation in a high nonlinear fiber (HNLF). In this work, we replaced a HNLF with an optical phase modulator in spectral compression to achieve high compression ratio and applied it to our 6-bit optical quantization. Comparing with the previous spectral compression, we can achieve the 3.3 times compression ratio and reduce 3.3 dB input power for 6-bit optical quantization. Furthermore, we confirmed the reliability of our system by simulating the bit-error rate (BER) at representative 64 intensity levels.

CiNii
B-10-88 5bit All-Optical Quantization Employing Soliton Self Frequency Shift and Self-Phase-Modulation-Based Multistage Spectral Compression

Takahashi Koji, Matsui Hideki, Konishi Tsuyoshi, Itoh Kazuyoshi

Proceedings of the IEICE General Conference 2011 ( 2 ) 397 - 397 2011.02

CiNii
B-7-10 Demonstration of highly accurate all-optical limiter based on self-phase modulation for 10-GHz optical pulse trains

Kawanishi Kentaro, Konishi Tsuyoshi, Drouet Florence, Takahashi Koji, Itoh Kazuyoshi

Proceedings of the Society Conference of IEICE 2010 ( 2 ) 86 - 86 2010.08

CiNii
B-12-25 Study on variable SSP optical code generation using LCOS

Kitsunai Masaaki, Konishi Tsuyoshi, Goto Hiroomi, Itoh Kazuyoshi

Proceedings of the IEICE General Conference 2009 ( 2 ) 486 - 486 2009.03

CiNii
Time-Frequency distribution profiling for response characteristics test of ultra-fast optical devices with optical spectrogram scope (OSS)

KONISHI Tsuyoshi, GOTO Hiroomi

IEICE technical report 108 ( 418 ) 55 - 58 2009.01

　View Summary

In this paper, we review and report the optical spectrogram scope(OSS) as a powerful measurement instrument for response characteristic test of ultra-fast all-optical devices and sub-systems in photonic networks. We apply OSS to optical signals passing through some optical devices and visualize its time-frequency status in a birdpsilas-eye view to demonstrate its usefulness for response characteristics test of ultra-fast optical devices including passive devices.

CiNii
Study on Effect of Signal Distortion for Extension of Dynamic Range of Optical Intensity Equalizer

GOTO Hiroomi, KONISHI Tsuyoshi, NISHITANI Takashi, ENOKI Tetsuya, ITOH Kazuyoshi

IEICE technical report 107 ( 544 ) 65 - 68 2008.03

　View Summary

It is necessary to compensate an optical signal intensity fluctuation in optical networks for accurate data reception and accurate signal processing. In order to compensate an optical intensity fluctuation, we have proposed and demonstrated an ultrafast all-optical intensity equalizer by using intensity-dependent spectral pattern changing based on self-phase modulation (SPM) in a fiber and optical signal pattern recognition technique. In this paper, we study on an expansion of the dynamic range of our proposed optical intensity equalizer by adding a signal distortion just before a fiber for SPM. We simulate the effects of super-Gaussian shape as an actual signal distortion.

CiNii
B-10-79 Evaluation of all-optical A/D conversion employing self-frequency shift and SPM-induced spectral compression

Nishitani Takashi, Konishi Tsuyoshi, Itoh Kazuyoshi

Proceedings of the IEICE General Conference 2008 ( 2 ) 362 - 362 2008.03

CiNii
B-12-6 Verification of the expansion in the applicable range by pre-chirp for all-optical intensity equalizer based on optical distortion recognition

Goto Hiroomi, Konishi Tsuyoshi, Nishitani Takashi, Itoh Kazuyoshi

Proceedings of the IEICE General Conference 2008 ( 2 ) 420 - 420 2008.03

CiNii
B-10-34 Improvement of resolution of an all-optical analog-to-digital converter using a dispersion decreasing fiber

Nishitani Takashi, Konishi Tsuyoshi, Itoh Kazuyoshi

Proceedings of the IEICE General Conference 2007 ( 2 ) 373 - 373 2007.03

CiNii
B-10-35 Study of expansion in the applicable range in terms of input pulse width

Goto Hiroomi, Konishi Tsuyoshi, Nishitani Takashi, Itoh Kazuyoshi

Proceedings of the IEICE General Conference 2007 ( 2 ) 374 - 374 2007.03

CiNii
B-12-41 Estimation of optimum pulse width based on bit error rate and Q-value for all-optical exclusive OR operation by use of self-frequency shift

Matsutani Isao, Konishi Tsuyoshi, Nishitani Takashi, Furukawa Hideaki, Itoh Kazuyoshi

Proceedings of the IEICE General Conference 2006 ( 2 ) 483 - 483 2006.03

CiNii
B-10-80 All-optical analog-to-digital conversion using fiber interconnection with bitwise signal allocation

Nishitani Takashi, Konishi Tsuyoshi, Itoh Kazuyoshi

Proceedings of the IEICE General Conference 2006 ( 2 ) 400 - 400 2006.03

CiNii
Ultra-Fast All-Optical Analog-to-Digital Conversion

KONISHI Tsuyoshi, ITOH Kazuyoshi

Japanese journal of optics 35 ( 1 ) 15 - 20 2006.01

CiNii
可逆的なフォトクロミズムを利用した自己制御型閾値可変低強度光リミッタの検討

後藤洋臣, 小西毅, 伊東一良

日本分光学会講演要旨集 2006 2006

J-GLOBAL
Demonstration of the all-optical M-ary ASK signal demultiplexer using optical multi-thresholding based on self-frequency shifting in a fiber

NISHITANI Takashi, KONISHI Tsuyoshi, ITOH Kazuyoshi

IEICE technical report 105 ( 471 ) 71 - 74 2005.12

　View Summary

To improve the spectral efficiency, the use of multilevel signals have much attracted recently. Because the M-ary ASK signal using multi-intensity levels has narrower spectral width than the binary signal at the same bit rate, it can improve the spectral efficiency in WDM transmission. To deal with the M-ary ASK signal, a M-ary ASK signal demultiplexer is indispensable. Previously, we have proposed the all-optical M-ary ASK signal demultiplexer using self-frequency shifting in a fiber. In this paper, we demonstrate the all-optical M-ary ASK signal demultiplexer. Experimental result shows that the quaternary ASK signal can be successfully demultiplexed into two 25 Gb/s OOK signals.

CiNii
Ultra-Fast Spatio-Temporal Information Processing

KONISHI Tsuyoshi

Japanese journal of optics 34 ( 8 ) 426 - 431 2005.08

CiNii
B-10-114 Optical sampling by use of four-wave mixing in SOA for realization of the all-optical analog-to-digital converter

Nishitani Takashi, Konishi Tsuyoshi, Itoh Kazuyoshi

Proceedings of the IEICE General Conference 2005 ( 2 ) 404 - 404 2005.03

CiNii
B-10-78 Improvement of recognition power by designing label recognition filter for ASK spread code

Furukawa H., Konishi T., Matsutani I., Itoh K.

Proceedings of the IEICE General Conference 2005 ( 2 ) 368 - 368 2005.03

CiNii
Optical spread code generation compatible with number of label entries

FURUKAWA Hideaki, KONISHI Tsuyoshi, MATSUTANI Isao, ITOH Kazuyoshi

Technical report of IEICE. OPE 104 ( 606 ) 29 - 32 2005.01

　View Summary

To improve the routing of packets in the optical packet switching, high speed and high performance label recognition processing are required. We have proposed novel optical label recognition method using optical spread code generation to realize both high recognition power in label recognition systems and high data transmission efficiency in network paths. We study on optical spread code generation that can handle the number of label entries in networks. As a result of the label recognition simulation using 1023 types of 1023-bit Gold codes generated from 1023 types of 10-bit optical codes, the maximum intensity ratio of correlation signals becomes much higher than 115.9 : 1.

CiNii
B-12-8 All-optical M-ary ASK signal demultiplexer using self-frequency shift in fiber

Nishitani Takashi, Konishi Tsuyoshi, Itoh Kazuyoshi

Proceedings of the Society Conference of IEICE 339 - 339 2005

CiNii
B-10-77 Suppression of crosstalk in header recognition by spread coding

Furukawa H., Konishi T., Oshita Y., Yu W., Itoh K., Ichioka Y.

Proceedings of the IEICE General Conference 2004 ( 2 ) 448 - 448 2004.03

CiNii
Application of ultrafast time-to-two-dimensional-space-to-time conversion (I): Time-varying spectral modulation for arbitrary ultrafast signal generation

T Konishi, Y Oshita, WJ Yu, H Furukawa, K Itoh, Y Ichioka

IEEE PHOTONICS TECHNOLOGY LETTERS 16 ( 2 ) 620 - 622 2004.02

DOI
バクテリオロドプシンの光サイクル反応を利用した光バッファメモリの検討

小柳謙一, 小西毅, 谷村和紀, 兼松泰男, 市田秀樹, 浜田格雄, 中村亮介, 伊東一良

応用物理学関係連合講演会講演予稿集 51st ( 3 ) 2004

J-GLOBAL
Recognition for Header Signal of Long Bit Length by using Optical Correlation Processing in the Spatial Domain

Furukawa H., Konishi T., Oshita Y., Yu W., Itoh K., Ichioka Y.

Proceedings of the Society Conference of IEICE 2003 ( 2 ) 379 - 379 2003.09

CiNii J-GLOBAL
Encrypted ultra-fast image transmission by using OTDM/WDM scheme

T. Konishi, Y. Oshita, K. Itoh, Y. Ichioka

JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS 5 ( 5 ) S365 - S369 2003.06

DOI
Design of Header Recognition Filter for Binary Phase Shift Keying in Header Recognition Unit using Time-Space Optical Information Processing

Furukawa H., Konishi T., Oshita Y., Yu W., Itoh K., Ichioka Y.

Proceedings of the IEICE General Conference 2003 ( 2 ) 485 - 485 2003.03

CiNii
Amplitude and Phase Retrieval of Ultrashort Optical Pulse Using Optical Spectrogram Scope

K. Tanimura, T. Konishi, K. Itoh, Y. Ichioka

OPTICAL REVIEW 10 ( 2 ) 77 - 81 2003.02

DOI
All-optical analog-to-digital converter by use of self-frequency shifting in fiber and a pulse-shaping technique

T Konishi, K Tanimura, K Asano, Y Oshita, Y Ichioka

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS 19 ( 11 ) 2817 - 2823 2002.11

DOI
Ultrafast Time-to-Two-Dimensional-Space Conversion System Using SHG Crystal

Y. Oshita, T. Konishi, Y. Ichioka

OPTICAL REVIEW 9 ( 4 ) 141 - 145 2002.04

DOI
バクテリオロドプシンの超高速光化学反応を利用した超高速SLMに関する検討

岩本匡平, 小西毅, 岡田佳子, 谷田純, 伊東一良, 一岡芳樹

応用物理学関係連合講演会講演予稿集 49th ( 3 ) 2002

J-GLOBAL
Two-dimensional image transmission based on the ultrafast optical data formats conversion between a temporal signal and a two-dimensional spatial signal

K Iwamoto, T Konishi, J Tanida, Y Ichioka

APPLIED OPTICS 40 ( 35 ) 6527 - 6534 2001.12

DOI
Direct time-space conversion of ultra-fast pulses based on interferometric time-of-flight cross correlation using a fast optical addressable spatial light modulator

T Konishi, H Furukawa, Y Ichioka, K Nakagawa, MR Melloch, DD Nolte

OPTICAL AND QUANTUM ELECTRONICS 33 ( 7-10 ) 1063 - 1076 2001.07

DOI
Fundamental functions for ultrafast optical routing by temporal frequency-to-space conversion

T. KONISHI, T. KOTANIGAWA, K. TANIMURA, H. FURUKAWA, Y. OSHITA, Y. ICHIOKA

Opt. Lett. 26 ( 18 ) 1445 - 1447 2001.06 [Refereed]

DOI
Ultrafast All-optical Proceesor for Time -to-Two-dimensional Space Conversion by Using Second Harmonic Generation

Tsuyoshi Konishi, Yoshinori Oshita, Osaka Science, Technology Center, Yoshiki Ichioka, NARA National, College of Technology

4110/,182-189 4110 182 - 189 2000.06 [Invited]

DOI
Ultra-fast Time and Space Optical Information Processing

KONISHI Tsuyoshi

20 179 - 180 2000.01

CiNii
Optical spectrogram scope using time-to-two-dimensional space conversion and interferometric time-of-flight cross correlation

T Konishi, Y Ichioka

OPTICAL REVIEW 6 ( 6 ) 507 - 512 1999.11

DOI
Optical Spectrogram Scope Using Time-to-Two-Dimensional Space Conversion and Interforometric Time-of -Flight Cross Correlation

KONISHI Tsuyoshi

OPTICAL REVIEW 6 ( 6 ) 507 - 512 1999.06

DOI CiNii
Ultrafast image transmission by optical time-to-two-dimensional-space-to-time-to-two-dimensional-space conversion

T Konishi, Y Ichioka

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION 16 ( 5 ) 1076 - 1088 1999.05
Ultrafast image transmission by optical time-to-two-dimensional-space-to-time-to-two-dimensional-space conversion

KONISHI Tsuyoshi

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION 16 ( 5 ) 1076 - 1088 1999.05 [International journal]

Authorship：Lead author

DOI CiNii
Technique for Ultrafast Image Transmission and 3-D Holographic TV

Tsuyoshi Konishi, Yoshiki Ichioka

PROGRESS IN CONNECTIONIST-BASED INFORMATION SYSTEMS, VOLS 1 AND 2 1 749 - 751 1997.09
Temporal-Spatial Optical Information Processing

Yoshiki Ichioka, Tsuyoshi Konishi

PHOTOREFRACTIVE FIBER AND CRYSTAL DEVICES: MATERIALS, OPTICAL PROPERTIES, AND APPLICATIONS III 3137 222 - 227 1997.07 [Invited]

DOI
Self-Aligned Interconnection System between Optical Computing Modules Using Injection Locking of Diode Laser

Tsuyoshi Konishi, Jun Tanida, Yoshiki Ichioka

1/,26-27 1 26 - 27 1996.04

　View Summary

【工学部論文データから移行】
Self-aligned Imaging System Using Phase Conjugate Rreadout from Elementary Holographic Grating

Tsuyoshi Konishi, Jun Tanida, Yoshiki Ichioka

Optics Laser Technology 28 ( 2 ) 83 - 87 1996.04 [Refereed]

DOI CiNii
Optical Implementation of Visible Gray-Image Morphology with the Visual-Area-Coding Technique

Tsuyoshi Konishi, Shuji Taniguchi, Jun Tanida, Yoshiki Ichioka

APPLIED OPTICS 35 ( 8 ) 1234 - 1239 1996.03
Time-Space conversion of 3D-Space Information by using Hologram

KONISHI Tsuyoshi

Japan Optics '96 Extended Abstracts 79 - 80 1996

　View Summary

【国立情報学研究所情報から移行】
Multiresolution pattern spectrum and its optical Implementation using visual area coding technique

KONISHI Tsuyoshi

Optical Review 3 ( 6 ) 410 - 413 1996

　View Summary

【国立情報学研究所情報から移行】

DOI
Gray Image Processing using Visual-Area Coding Technique (VACT)

Tsuyoshi Konishi, Shuji Taniguchi, Jun Tanida, Yoshiki Ichioka

Pacific Rim Conference on Lasers and Electro-Optics, CLEO'95 139 - 140 1995.07

　View Summary

【工学部論文データから移行】
VISUAL-AREA CODING TECHNIQUE (VACT) - OPTICAL PARALLEL IMPLEMENTATION OF FUZZY-LOGIC AND ITS VISUALIZATION WITH THE DIGITAL-HALF-TONING PROCESS

T KONISHI, J TANIDA, Y ICHIOKA

APPLIED OPTICS 34 ( 17 ) 3097 - 3102 1995.06
Visual-Area Coding Technique (VACT): Optical Parallel Implementation of Fuzzy Logic and Visualization of its Results with Digital Halftoning

Tsuyoshi Konishi, Jun Tanida, Yoshiki Ichioka

Optical Computing Technical Digest 1995 10 34 - 35 1995.03

　View Summary

【工学部論文データから移行】
P-OPALS : Pure optical parallel array logic system

Jun Tanida, Tsuyoshi Konishi, Yoshiki Ichioka

Proceedings of the IEEE 82 ( 11 ) 1668 - 1677 1994.11 [Refereed] [Invited]

DOI
PURE OPTICAL PARALLEL ARRAY LOGIC SYSTEM : AN OPTICAL PARALLEL COMPUTING ARCHITECTURE,

KONISHI Tsuyoshi

/,323 323 1994.03

　View Summary

【国立情報学研究所情報から移行】
Iterative processing on a hybrid optical parallel array logic system with a selectable coherent correlator,

KONISHI Tsuyoshi

APPLIED OPTICS 32 ( 17 ) 3053 - 3058 1993.06

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Industrial Property Rights

Waveform reconstruction device, waveform reconstruction system, and waveform reconstruction method

US8,886,037

Tsuyoshi Konishi, Takuya Kato, Hiroomi Goto

Patent
光波長測定方法および光波長測定装置

特許第6056096号

小西毅, 佐藤豪真, 永島知貴

Patent

J-GLOBAL
WAVEFORM RECONSTRUCTION DEVICE, WAVEFORM RECONSTRUCTION SYSTEM, WAVEFORM RECONSTRUCTION METHOD

Tsuyoshi KONISHI, Takuya KATO, Hiroomi GOTO

Patent
Chirp indicator of ultrashort optical pulse

US7379186 B2

Tsuyoshi KONISHI

Patent
光パルス発生方法およびその装置

4044277

小西毅, 一岡芳樹, 岩本匡平

Patent
時間信号の空間信号への直接超高速変換方法および装置

4044271

小西毅

Patent
超短光パルス信号の分散補償方法およびその装置

4027858

小西毅, 伊東一良, 一岡芳樹

Patent
時系列光信号の超高速処理方法および装置

3854074

小西毅

Patent
Method for extra-high speed transformation of time signal into two-dimensional space signal

US Patent 7,102,810

Yoshiki Ichioka, Tsuyoshi KONISHI

Patent
photon block

Junichi Takahara, Yasutika Hasegawa, Yasuo Kanematsu, Hiroshi Kawabata, Tomoo Nagayama, Tsuyoshi Konishi, Tetsuro Kobayashi

Patent
極短光パルスの波形計測方法

3018173

一岡芳樹, 小西毅

Patent

　View Summary

特許第３０１８１７３号
時間信号から二次元空間信号への超高速変換方法及び装置

Patent

　View Summary

特開２００２−０７２２７０
時間信号の空間信号への直接高速変換方法および装置

Patent

　View Summary

特開２００２−００６３５６
有効屈折率法を用いたブレーズド位相型回折光学素子及びその製造方法

Patent

　View Summary

特開２００１−３１８２１７
時間信号の２次元空間信号への超高速変換方法

Patent

　View Summary

特開２０００−２７５６８９
空間−時間−空間信号処理方法

Patent

　View Summary

特開平１１−４６３０４

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Syllabus

Research on Photonic Information Technology

Graduate School of Fundamental Science and Engineering

2025 full year
Science and Engineering Laboratory 1B III

School of Fundamental Science and Engineering

2025 fall semester
Science and Engineering Laboratory 1A III

School of Fundamental Science and Engineering

2025 spring semester
Physical Electronics Laboratory B

School of Fundamental Science and Engineering

2025 spring quarter
Physical Electronics Seminar B

School of Fundamental Science and Engineering

2025 spring quarter
Physical Electronics Laboratory A

School of Fundamental Science and Engineering

2025 winter quarter
Physical Electronics Seminar A

School of Fundamental Science and Engineering

2025 winter quarter
Bachelor Thesis B

School of Fundamental Science and Engineering

2025 spring semester
Bachelor Thesis B

School of Fundamental Science and Engineering

2025 fall semester
Bachelor Thesis B [S Grade]

School of Fundamental Science and Engineering

2025 fall semester
Electromagnetic Theory C

School of Fundamental Science and Engineering

2025 fall semester
Electronic and Physical Systems Laboratory B [S Grade]

School of Fundamental Science and Engineering

2025 spring semester
Photonics [S Grade]

School of Fundamental Science and Engineering

2025 spring semester
Photonics

School of Fundamental Science and Engineering

2025 spring semester
Bachelor Thesis A

School of Fundamental Science and Engineering

2025 spring semester
Bachelor Thesis A [S Grade]

School of Fundamental Science and Engineering

2025 fall semester
Introduction to Electronic and physical systems [S Grade]

School of Fundamental Science and Engineering

2025 spring semester
Bachelor Thesis A [S Grade]

School of Fundamental Science and Engineering

2025 spring semester
Introduction to Electronic and physical systems

School of Fundamental Science and Engineering

2025 spring semester
Bachelor Thesis A

School of Fundamental Science and Engineering

2025 fall semester
Electronic and Physical Systems Practice C [S Grade]

School of Fundamental Science and Engineering

2025 spring semester
Special Seminar on Electronic and Physical Systems

School of Fundamental Science and Engineering

2025 fall semester
Electronic and Physical Systems Laboratory C [S Grade]

School of Fundamental Science and Engineering

2025 fall semester
Electronic and Physical Systems Practice C

School of Fundamental Science and Engineering

2025 spring semester
Electronic and Physical Systems Laboratory C

School of Fundamental Science and Engineering

2025 fall semester
Electronic and Physical Systems Laboratory B

School of Fundamental Science and Engineering

2025 spring semester
Electronic and Physical Systems Laboratory A [S Grade]

School of Fundamental Science and Engineering

2025 fall semester
Electronic and Physical Systems Laboratory A

School of Fundamental Science and Engineering

2025 fall semester
Electromagnetic Theory B [S Grade]

School of Fundamental Science and Engineering

2025 fall semester
Electromagnetic Theory B

School of Fundamental Science and Engineering

2025 fall semester
Science and Engineering Laboratory 1B III

School of Creative Science and Engineering

2025 fall semester
Science and Engineering Laboratory 1A III

School of Creative Science and Engineering

2025 spring semester
Science and Engineering Laboratory 1B III

School of Advanced Science and Engineering

2025 fall semester
Science and Engineering Laboratory 1A III

School of Advanced Science and Engineering

2025 spring semester
Topics on Photonics

Graduate School of Fundamental Science and Engineering

2025 spring semester
Research on Photonic Information Technology

Graduate School of Fundamental Science and Engineering

2025 full year
Seminar on Photonic Information Technology C

Graduate School of Fundamental Science and Engineering

2025 spring semester
Seminar on Photonic Information Technology D

Graduate School of Fundamental Science and Engineering

2025 fall semester
Master's Thesis (Department of Electronic and Physical Systems)

Graduate School of Fundamental Science and Engineering

2025 full year
Master's Thesis (Department of Electronic and Physical Systems)

Graduate School of Fundamental Science and Engineering

2025 full year
Seminar on Photonic Information Technology B

Graduate School of Fundamental Science and Engineering

2025 fall semester
Seminar on Photonic Information Technology A

Graduate School of Fundamental Science and Engineering

2025 spring semester
Seminar on Photonic Information Technology C

Graduate School of Fundamental Science and Engineering

2025 spring semester
Topics on Photonics

Graduate School of Fundamental Science and Engineering

2025 spring semester
Seminar on Photonic Information Technology D

Graduate School of Fundamental Science and Engineering

2025 fall semester
Seminar on Photonic Information Technology B

Graduate School of Fundamental Science and Engineering

2025 fall semester
Seminar on Photonic Information Technology A

Graduate School of Fundamental Science and Engineering

2025 spring semester
Research on Photonic Information Technology

Graduate School of Fundamental Science and Engineering

2025 full year

▼display all

Teaching Experience

電磁気学Ｃ

2024.10

-

Now
電磁気学Ｂ

2024.10

-

Now
Photonics Special Lecture

Waseda University
2024.04

-

Now
OptoElectronics

Waseda University
2024.04

-

Now
Introduction to Photonics

2024.10

-

2025.02
Temporal-Spatio Photonics Technology

2020

-

　
Introduction to Modern Applied Optics and Photonics

2020

-

　
Quantum Optics

2020

-

　
Optics

2009

-

▼display all

Social Activities

日本学術振興会産学協力研究委員会フォトニクス情報システム第179委員会（運営委員）

2016.04

-

Now
日本学術振興会産学協力研究委員会フォトニクス情報システム第179委員会（庶務幹事）

2006.06

-

2016.03
学術振興会先導的研究開発委員会（庶務幹事）

2004.10

-

2006.03

Academic Activities

IEEE Photonics Society Kansai Chapter（Chair）

Other

2020.04

-

Now
IEICE (Guest Associate Editor)

Other

2019.09

-

Now
電子情報通信学会通信ソサイエティ（編集委員）

Other

2018.03

-

Now
応用物理学会分科会日本光学会次世代フォトニックネットワークのための光技術研究グループ（代表幹事）

Other

2010.04

-

Now
電子情報通信学会超高速光エレクトロニクス研究会（専門委員（部会主査））

Other

2009.04

-

Now
電子情報通信学会フォトニックネットワーク研究会（専門委員）

Other

2009.04

-

Now
電子情報通信学会エレクトロニクスソサイエティ超高速光エレクトロニクス研究会（専門委員）

Other

2005.04

-

Now
電子情報通信学会通信ソサイエティフォトニックネットワーク研究会（専門委員）

Other

2003.04

-

Now
The 12th International Conference on Optics-photonics Design and Fabrication, ODF ’20

Academic society, research group, etc.

日本光学会

2021.06

-

　
Photonics West2021

Academic society, research group, etc.

SPIE

2021.01

-

　
IEEE Photonics Society Kansai Chapter（Vice chair）

Other

2019.01

-

2020.03
Photonics West2020

Academic society, research group, etc.

SPIE

2020.01

-

　
応用光学懇談会特別講演会

Exhibition

応用光学懇談会

2019.11

-

　

　View Summary

招待講演、2019年11月18日, 大阪大学中之島センター.
IEEE Photonics Society Kansai Chapter 第5回フォトニクス英語発表会

Academic society, research group, etc.

IEEE Photonics Society KANSAI

2019.11

-

　
OECC/PSC2019

Academic society, research group, etc.

IEICE, OSA

2019.07

-

　
IEICE光関係合同研究会IEEE Photonics Society Kansai Chapter 特別講演

Academic society, research group, etc.

IEEE Photonics Society KANSAI

2019.01

-

　
Photonics West2019

Academic society, research group, etc.

SPIE

2019.01

-

　
IEEE Photonics Society Kansai Chapter（Secretary ）

Other

2018.04

-

2018.12
The 11th International Conference on Optics-photonics Design and Fabrication, ODF ’18

Academic society, research group, etc.

日本光学会

2018.11

-

　
IEEE Photonics Society Kansai Chapter 第4回フォトニクス英語発表会

Academic society, research group, etc.

IEEE Photonics Society KANSAI

2018.09

-

　
PSC2018

Academic society, research group, etc.

OSA

2018.09

-

　
OPTICS 2018

Academic society, research group, etc.

INSTICC

2018.07

-

　
Photonics West2018

Academic society, research group, etc.

SPIE

2018.01

-

　
OPJ2017（日本光学会年次学術講演会）

Academic society, research group, etc.

日本光学会

2017.11

-

　
OPTICS 2017

Academic society, research group, etc.

INSTICC

2017.07

-

　
「光ネットワーク超低エネルギー化技術拠点」NASG会合レクチャー

Exhibition

NASG

2017.03

-

　

　View Summary

NASG会合レクチャー, 秋葉原UDXビル(2017年2月27日).
OFC2017

Academic society, research group, etc.

OSA

2017.03

-

　
応用物理学会フォトニクス分科会（幹事）

Other

2014.12

-

2017.03
Photonics West 2017

Academic society, research group, etc.

SPIE

2017.01

-

　
第50回光学五学会関西支部連合講演会

Exhibition

光学五学会

2016.12

-

　

　View Summary

招待講演、2016年12月10日, 大阪市立大学文化交流センター).
International Workshop on Optical Signal Processing and Optical Switching

Academic society, research group, etc.

IWOO committee

2016.11

-

　
OPJ2016（日本光学会年次学術講演会）

Academic society, research group, etc.

日本光学会

2016.11

-

　
OPTICS2016

Academic society, research group, etc.

INSTICC

2016.07

-

　
OFC2016

Academic society, research group, etc.

OSA

2016.03

-

　
OPTICS2015

Academic society, research group, etc.

INSTICC

2015.07

-

　
OFC2015

Academic society, research group, etc.

IEEE, OSA

2015.03

-

　
先端光テクノロジー展

Exhibition

2011.12

-

　

　View Summary

平成２３年１２月７日から９日の日程でパシフィコ横浜において開催。産学官連携に係るイベントへの出展等支援を受けた。
海外客員研究員受入れ

Other

2010.06

-

2010.08

　View Summary

部局間交流協定を結んだフランス共和国のグランゼコールから客員研究員を３ヶ月間程度受入れ、研究交流だけでなく国際交流を進めた。
7th International Conference on Optics-photonics Design & Fabrication

Academic society, research group, etc.

the Optics Design Group (ODG) of the Optical Society of Japan (OSJ)

2010.04

-

　
2009 International Conference on Optical Instrument and Technology (OIT’09)

Academic society, research group, etc.

SPIE, CIS and COS

2009.10

-

　
SPIE Optics+Photonics 2009

Academic society, research group, etc.

SPIE

2009.08

-

　
応用物理学会関西支部（幹事）

Other

2008.04

-

2009.03
Photonics in Switching 2008

Academic society, research group, etc.

IEICE Communication Society

2008.08

-

　
Photonic Devices+Applications (part of SPIE Optics+Photonics 2008)

Academic society, research group, etc.

SPIE

2008.08

-

　
ODF2008

Academic society, research group, etc.

OSJ (JSAP)

2008.06

-

　
6th international Conference on Optics-photonics Design & Fabrication (ODF'07)

Academic society, research group, etc.

日本光学会

2008.06

-

　
第４回超高速光エレクトロニクス研究会－最新の光通信技術－

Academic society, research group, etc.

電子情報通信学会超高速光エレクトロニクス研究会

2008.04

-

　
応用物理学会シンポジウム「フォトニックICT の展開」

Exhibition

応用物理学会フォトニックICT 研究会

2008.03

-

　
応用物理学会関西支部（支部長付き幹事）

Other

2007.04

-

2008.03
International Joint Workshop on OCDMA and OPS 2007

Academic society, research group, etc.

情報通信研究機構、精華大学、日本光学会OPN研究会

2007.11

-

　
日本光学会年次学術講演会

Academic society, research group, etc.

応用物理学会日本光学会

2007.11

-

　
CLEO/Pacific Rim 2007

Academic society, research group, etc.

IEEE LEOS

2007.08

-

　
第５０回精研シンポジウム「フォトニックネットワークデバイスの新展開 (6)」

Exhibition

東京工業大学精密工学研究所

2007.03

-

　
Symposium on Innovative Lightwave Technology

Academic society, research group, etc.

情報通信研究機構、日本光学会OPN研究会（共催）

2007.03

-

　
応用物理学会日本光学会（幹事）

Other

2005.04

-

2007.03
応用物理学会分科会日本光学会次世代フォトニックネットワークのための光技術研究グループ（代表幹事）

Other

2004.04

-

2007.03
5th international Conference on Optics-photonics Design & Fabrication (ODF'06)

Academic society, research group, etc.

日本光学会

2006.12

-

　
第９８回微小光学研究会「微小光学の発展」

Exhibition

応用物理学会日本光学会微小光学研究グループ

2005.12

-

　
日本光学会年次学術講演会

Academic society, research group, etc.

応用物理学会日本光学会

2005.11

-

　
レーザー学会年次大会

Academic society, research group, etc.

レーザー学会

2005.01

-

　
日本光学会年次学術講演会

Academic society, research group, etc.

応用物理学会日本光学会

2004.11

-

　
InterOpto'04

Exhibition

財団法人光産業技術振興協会

2004.07

-

　

　View Summary

日本国内で最大の光産業に関する国際展示会にて、実機による展示を行い、おおきな関心を持たれた。
ICO International Conference, Optics & Photonics in Technology Frontier

Academic society, research group, etc.

The International Commision for Optics

2004.07

-

　
日本光学会年次学術講演会

Academic society, research group, etc.

応用物理学会日本光学会

2003.12

-

　
InterOpto'02

Exhibition

財団法人光産業技術振興協会

2002.07

-

　
応用物理学会「最新の光設計・その応用」シンポジウム

Exhibition

応用物理学会日本光学会光設計研究グループ

2002.03

-

　
InterOpto'01

Exhibition

財団法人光産業技術振興協会

2001.07

-

▼display all

Sub-affiliation

Faculty of Science and Engineering Graduate School of Fundamental Science and Engineering

Research Institute

2024

-

2026

Waseda Research Institute for Science and Engineering Concurrent Researcher

Internal Special Research Projects

超広帯域アナログ／デジタル変換のための光信号処理に関する研究

2024 中山

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次世代情報通信技術（Beyond5G）の実現における最も深刻な実装上のボトルネックの一つとして、アナログ・デジタル変換（ADC）の広帯域化の基礎的な検討を進めた。Beyond5G における情報通信の高速化および大容量化にむけて、数十GHz～数THz の高周波信号の取り扱いが求められているが、高周波化に伴う問題点として、ADCおよびDACのいずれにおいても、熱雑音などによる時間ジッタの影響を障壁とする有効ビット数（分解能）の低下の問題が顕在化してきている。　これまでに、高い有効ビット数を維持したまま、この時間ジッタの問題を効果的に圧縮する方法として、低コストで低消費電力な低周波AWG の出力信号から光の性質を用いて高周波信号を生成する高周波移行技術を提案し、生成可能な高周波信号の一つとして、光サンプリングパルス列の生成の検討を進めてきている．本研究では、アナログおよびデジタル信号間の帯域や精度に関する不整合を整える役割を実現するために、提案する高周波移行技術自体の検討を更に進めるとともに、ADCにおけるサンプリング技術としての応用展開を目的とし、帯域整合と情報圧縮の導入を念頭に置いた光サンプリングパルスの生成の検討を行った。また、高周波光サンプリングパルス生成には、これまでに提案してきている高周波移行技術を用い、情報圧縮に耐えうるADCにおけるサンプリング技術の確保を念頭に置いた生成した信号の時間ジッタを中心とした品質評価を行った。帯域整合が可能な生成高周波光サンプリングパルス列の時間ジッタや実現可能な有効ビット数などの信号品質について検討し、10GSpsにおいて1psを下回る非常に低い時間ジッタと十分に高い約7ビットの有効ビット数の実現可能性を確認した。今後、得られた成果をもとに帯域整合と情報圧縮の導入に関する研究を更に進める予定である。