Organization
Institute of Integrated Research Laboratory for Future Interdisciplinary Research of Science and Technology Assistant Professor
Title
Assistant Professor
External link
aikawa yohei
Degree
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Ph.D. in Engineering ( 2017.3 Tokyo Institute of Technology )
Research Interests
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Optical device
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Optical signal processing
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Optical communication
Research Areas
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Communication and network engineering / Optical communication
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Nanotechnology/Materials / Optical engineering and photon science / Optical signal processing
Education
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Tokyo Institute of Technology
2014.4 - 2017.3
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Tokyo Institute of Technology
2008.4 - 2010.3
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University of Tsukuba
2006.4 - 2008.3
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Gunma National College of Technology Department of Electronics and Information Engineering
2001.4 - 2006.3
Country： Japan
Research History
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Institute of Science Tokyo Laboratory for Future Interdisciplinary Research of Science and Technology Tenure-track Assistant professor
2025.10
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Japan Science and Technology Agency ACT-X
2023.10 - 2026.3
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Institute of Science Tokyo（Tokyo Institute of Technology） Laboratory for Future Interdisciplinary Research of Science and Technology Assistant Professor
2022.4 - 2025.9
Country：Japan
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Okinawa National College of Technology Department of Information And Communication Systems Engineering Assistant Professor
2017.4 - 2022.3
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JSPS, Doctoral Course Research Fellowships: DC1
2014.4 - 2017.3
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KDDI CORPORATION
2010.4 - 2014.3
Committee Memberships
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IEICE Technical Committee on OptoElectronics
2026.6
Committee type：Academic society
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IEICE Technical Committee on Optical Communication Systems
2025.6
Committee type：Academic society
Papers
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SOI-based 4×4 MMI device for high-contrast QPSK pattern recognition Reviewed
Yohei Aikawa, Hiroyuki Uenohara
Optics Continuum 5 ( 5 ) 1388 - 1397 2026.4
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Optical Digital Decoder Consisting of 4×4 Multi-Mode Interferometer Coupler Reviewed
Yohei Aikawa, Hiroyuki Uenohara
Journal of Lightwave Technology 42 ( 22 ) 7929 - 7936 2024.11
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High‐contrast QPSK pattern recognition device consisting of a 4×4 MMI coupler Reviewed
Yohei Aikawa, Hiroyuki Uenohara
Electronics Letters 60 ( 21 ) 2024.10
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All-optical 2-bit decoder based on a silicon waveguide device for BPSK-modulated signals Reviewed
Yohei Aikawa, Hiroyuki Uenohara
Optics Continuum 3 ( 4 ) 627 - 635 2024.4
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Yohei Aikawa, Hiroyuki Uenohara
IET Optoelectronics 17 ( 5 ) 214 - 219 2023.7
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Yohei Aikawa
IET Optoelectronics 16 ( 4 ) 188 - 194 2022.6
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Y. Aikawa
Electronics Letters 56 ( 16 ) 830 - 832 2020.8
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Yohei Aikawa, Hiroyuki Uenohara
IET Optoelectronics 14 ( 1 ) 22 - 29 2020.2
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Y. Aikawa
Electronics Letters 55 ( 21 ) 1139 - 1141 2019.10
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Ultracompact Optical Comparator for 4-bit QPSK-Modulated Signal Based on Silicon Photonic Waveguide Reviewed
Yohei Aikawa
IEEE Photonics Journal 11 ( 3 ) 1 - 10 2019.6
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Yohei Aikawa
Applied Sciences 8 ( 9 ) 1440 - 1440 2018.8
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Yohei AIKAWA
IEEE Photonics Journal 10 ( 2 ) 1 - 11 2018.4
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A Study on Optical Forward Error Correction Coding Scheme with Convolutional code Reviewed
Yohei AIKAWA
Tokyo Institute of Technology 2017.3
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Demonstration of Optical FEC Coding Scheme With Convolutional Code Consisting of a Signal Source Reviewed
Yohei Aikawa, Hiroyuki Uenohara
IEEE Photonics Technology Letters 29 ( 1 ) 165 - 168 2017.1
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Proposal and analytical investigation of optical comparator for optical and electrical converted Viterbi-decoding scheme Reviewed
Y. Aikawa, H. Uenohara
ELECTRONICS LETTERS 52 ( 16 ) 1397 - 1398 2016.8
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Yohei Aikawa, Hiroyuki Uenohara
IEEE Photonics Journal 8 ( 2 ) 1 - 11 2016.4
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Bit rate adaptable operation of a hybrid integrated wavelength converter using a semiconductor optical amplifier type Mach-Zehnder interferometer Reviewed
Hiroyuki Uenohara, Yohei Aikawa
OPTICS LETTERS 38 ( 23 ) 4982 - 4984 2013.12
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Yohei Aikawa, Satoshi Shimizu, Hiroyuki Uenohara
Journal of Lightwave Technology 29 ( 15 ) 2259 - 2266 2011.8
MISC
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光領域での尤度算出技術に基づくオンチップ光ラベル識別デバイス
相川洋平
光アライアンス（特集：シリコンフォトニクスが拓く応用展開） 35 ( 2 ) 6 - 10 2024.2
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若手研究者の挑戦(第88回)光導波路による尤度算出デバイス : 光パケット識別技術をめざして
相川 洋平
Optronics : 光技術コーディネートジャーナル 42 ( 6 ) 133 - 137 2023.6
Presentations
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A Study on Gate Characteristics in 4×4 Carrier-Injection-Type Silicon Photonics Broadcast and Select Switches
Hiroto Kimura, Yuya Sugiyama, Yohei Aikawa, Hiroyuki Uenohara
2026.3
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Decoder Design Using Linear Interference via Riemannian Optimization on Unitary Manifolds
Zhang Rui, Yohei Aikawa, Hiroyuki Uenohara
2026.3
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Characterization of;optical switches based on switch control signals using parallel label
Yasuo Matsunami, Yohei Aikawa, Hiroyuki Uenohara
2026.3
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線形光学干渉に基づく光ディジタル論理回路 Invited
相川洋平
レーザー学会 第6 回 光コンピューティング技術専門委員会 2025.12
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Waveguide-based mode converter with a recursive structure for scalable expansion
Yohei AIKAWA Hiroyuki, UENOHARA
IEICE Technical Report 2025.10
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Performance Optimization of Optical Decoders Using Multimode Interferometers
Zhang Rui, Yohei Aikawa, Uenohara Hiroyuki
The 30th Opto-Electronics and Communications Conference / Photonics in switching and computing 2025 (OECC/PSC 2025) 2025.6
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Reconfigurable Optical Decoder and Half-adder Composed of Unitary Converter
Yohei Aikawa, Hiroyuki Uenohara
The 30th Opto-Electronics and Communications Conference / Photonics in switching and computing 2025 (OECC/PSC 2025) 2025.6
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2-bit Operation of Optical Half-adder Based on a 4×3 MMI
Yohei Aikawa, Hiroyuki Uenohara
2025.3
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Arbitrary Parallel TE0/TE1/TE2/TE3 Mode Converter Consisting of Mode (De)Multiplexers
Yohei Aikawa, Hiroyuki Uenohara
2024.9
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Evaluation of BER for Different Schemes of a 4 × 4 MMI Based 2-bit Optical Decoder
Rui Zhang, Yohei Aikawa, Hiroyuki Uenohara
2024.9
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Steady-state characteristics of 2-bit Optical Decoder based on 4x4 Multi-mode Interferometer Coupler
Yohei Aikawa, Hiroyuki Uenohara
The 29th Opto-Electronics and Communications Conference 2024 2024.6
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A Proposal of 4 × 4 MMI Based 2-bit Optical Decoder for Improving Extinction Ratio
Rui Zhang, Yohei Aikawa, Hiroyuki Uenohara
2024.3
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2-bit Decoding Operation based on 4x4 MMI-type Optical Decoder
Yohei Aikawa, Hiroyuki Uenohara
2024.3
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2-Bit Optical Decoder Based on 4x4 Multi-Mode Interferometer Coupler for BPSK-Modulated Signals
Yohei Aikawa, Hiroyuki Uenohara
2023 International Conference on Photonics in Switching and Computing (PSC) 2023.9 IEEE
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Investigation of BER Performance of Optical D/A conversion Scheme for PAM4 signals
Shunya Tashiro, Yohei Aikawa, Hiroyuki Uenohara
2023.9
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Low-loss MMI-type Optical 90◦ Hybrid with Multi Signal Inputs
Yohei Aikawa, Hiroyuki Uenohara
2023.9
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C-3/4-20 MMI型光復号化回路における解析的動作実証
AIKAWA Yohei, Hiroyuki Uenohara
Proceedings of the IEICE General Conference 2023.3
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C-3/4-64 光信号処理による復号化回路の提案および基本動作の実証
AIKAWA Yohei, Hiroyuki Uenohara
Proceedings of the IEICE General Conference 2022.9
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Integrated Optical Comparator for 2 successive QPSK-modulated Symbols Based on Silicon Photonic Waveguide (Invited Talk) Invited
Yohei AIKAWA
International Conference on Photonics Research (Interphotonics 2019) 2019.11
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Optical comparator for two-successive QPSK signal based on silicon photonics technology
Yohei AIKAWA
Technical report of IEICE. OCS 2019.10
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Optical comparator for QPSK-modulated signal based on silicon waveguide
AIKAWA Yohei, Hiroyuki Uenohara
Proceedings of the IEICE General Conference 2019.3
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Yohei Aikawa
31st Annual Conference of the IEEE Photonics Society, IPC 2018 2018.11
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Optical Comparator for PSK-modulated Signals by Using Serially-Cascaded Delay Line Interferometer (Invited talk) Invited
Yohei AIKAWA
International Conference on Photonics Research (Interphotonics 2018) 2018.10
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A study on optical signal processing for channel coding and decoding technologies
AIKAWA Yohei, UENOHARA Hiroyuki
Proceedings of the IEICE General Conference 2018.9
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Optical comparator for QPSK signal using delayed interferometer at 10 Gbaud
2018.2
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Experimental Demonstration of Optical Comparison Operation for 4-bit QPSK signal
AIKAWA Yohei, UENOHARA Hiroyuki
Proceedings of the IEICE General Conference 2017.8
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Yohei Aikawa, Hiroyuki Uenohara
Optics InfoBase Conference Papers 2017.7 OSA - The Optical Society
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Performance Investigation for NCG of Optical Coding Circuit Consisting of Optical XOR gate based on FWM
AIKAWA Yohei, UENOHARA Hiroyuki
Proceedings of the IEICE General Conference 2017.3
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Experimental Demonstration of All-Optical FEC Coding Scheme with Convolutional Code Consisting of HNLF-based XOR Gates and Wavelength Converters
Yohei AIKAWA, Hiroyuki UENOHARA
Technical report of IEICE. OCS 2016.10
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Yohei Aikawa, Hiroyuki Uenohara
European Conference on Optical Communication, ECOC 2016.9
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Experimental Demonstration of All-Optical FEC Coding Scheme with Convolutional Code
Yohei AIKAWA, Hiroyuki UENOHARA
21ST OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) HELD JOINTLY WITH 2016 INTERNATIONAL CONFERENCE ON PHOTONICS IN SWITCHING (PS) 2016.7
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光誤り訂正技術の実現検討 ～OptSimによる解析結果と測定結果との比較～
Yohei AIKAWA, Hiroyuki UENOHARA
2016.6
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光信号歪補償・誤り訂正を目指した変復調・符号化技術
Hiroyuki Uenohara, Yohei Aikawa, Hirochika Kagawa
2016.6
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C-3-16 Experimental Evaluation of the Performance of Optical XOR Gate using FWM in HNLF for All-optical Coding Circuit
AIKAWA Yohei, UENOHARA Hiroyuki
Proceedings of the IEICE General Conference 2016.3 The Institute of Electronics, Information and Communication Engineers
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Analytical Investigation of Opt-Electrical Converted V iterbi Decoding with Optical Comparators
Yohei AIKAWA, Hiroyuki UENOHARA
Technical report of IEICE. OCS 2015.12
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A proposal and analytical investigation of optical comparison-operation scheme for Viterbi decoding
Yohei Aikawa, Hiyoyuki Uenohara
Asia Communications and Photonics Conference, ACP 2015 2015.11
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B-10-28 Analytical Demonstration of Opt-electrical Viterbi-Decoding Operation Using Optical Comparator
AIKAWA Yohei, UENOHARA Hiroyuki
Proceedings of the Society Conference of IEICE 2015.8 The Institute of Electronics, Information and Communication Engineers
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Analytical Investigation of All-optical XOR Operation Based on FWM in HNLF with DPSK Modulated Signals
Yohei Aikawa, Hiroyuki Uenohara
iNOW - International Nano-Optoelectronics Workshop Conference 2015.8
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B-10-65 Analytical Demonstration of All-Optical Coding Circuit using Convolution Code
AIKAWA Yohei, UENOHARA Hiroyuki
Proceedings of the IEICE General Conference 2015.2 The Institute of Electronics, Information and Communication Engineers
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Analytical Investigation of All-Optical FEC Coding Scheme with Convolutional Code
Yohei Aikawa, Hiroyuki Uenohara
2015 INTERNATIONAL CONFERENCE ON PHOTONICS IN SWITCHING (PS) 2015
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B-18-60 Analytical Evaluation of Location-Based Service for Using Push Notification System
AIKAWA Yohei, OUTASSOURT Issam, HEI Yuichiro, TANAKA Toshiaki
Proceedings of the IEICE General Conference 2014.3 The Institute of Electronics, Information and Communication Engineers
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B-19-46 Proposal of a Location-Based Push Notification Method without Sensing Users' Presence
Aikawa Yohei, Hei Yuichiro, Ogishi Tomohiko
Proceedings of the IEICE General Conference 2013.3 The Institute of Electronics, Information and Communication Engineers
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C-3-5 Investigation of a SOA-MZI-type wavelength converter with adaptable bit rate operation
Uenohara Hiroyuki, Aikawa Yohei
Proceedings of the IEICE General Conference 2013.3 The Institute of Electronics, Information and Communication Engineers
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Topology-Aware Clustering to Achieve Latency Comparable to One-Frame in Multiplayer Online Games
Yohei Aikawa, Yuichiro Hei, Tomohiko Ogishi, Sumaru Niida, Toru Hasegawa
2013 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 2013
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Analytical Evaluation of User matching using IP-Geolocation for Low-Latency Multiplayer Online Games
AIKAWA Yohei, HEI Yuichiro, OGISHI Tomohiko, NIIDA Sumaru, HASEGAWA Toru
Technical report of IEICE. CQ 2012.11 The Institute of Electronics, Information and Communication Engineers
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B-7-18 Analytical Evaluation of User Matching with the aid of IP-Geolocation for Constructing Low-latency P2P Networks
Aikawa Yohei, Hei Yuichiro, Ogishi Tomohiko, Hasegawa Toru
Proceedings of the Society Conference of IEICE 2012.8 The Institute of Electronics, Information and Communication Engineers
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B-7-5 Analytical Evaluation of Constructing Low-Latency P2P Networks with the aid of IP Geolocation
AIKAWA Yohei, HEI Yuichiro, OGISHI Tomohiko
Proceedings of the IEICE General Conference 2012.3 The Institute of Electronics, Information and Communication Engineers
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Hybrid integrated semiconductor optical amplifier-Mach Zehnder interferometer (SOA-MZI)-type all-optical wavelength converter with a selectable delay time push-pull configuration
Hiroyuki Uenohara, Yohei Aikawa
Technical Digest - 2012 17th Opto-Electronics and Communications Conference, OECC 2012 2012
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B-7-57 A Study on Constructing Low-Latency P2P Networks with the aid of IP Geolocation
AIKAWA Yohei, HEI Yuichiro, OGISHI Tomohiko
Proceedings of the Society Conference of IEICE 2011.8 The Institute of Electronics, Information and Communication Engineers
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Yohei Aikawa, Satoshi Shimizu, Hiroyuki Uenohara
Optics InfoBase Conference Papers 2010.12
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B-12-14 Investigation of Operation Performance of an All Optical XOR Gate for All Optical FEC
Aikawa Yohei, Shimizu Satoshi, Uenohara Hiroyuki
Proceedings of the IEICE General Conference 2010.3 The Institute of Electronics, Information and Communication Engineers
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Aikawa Yohei, Shimizu Satoshi, Uenohara Hiroyuki
Proceedings of the Society Conference of IEICE 2009.9 The Institute of Electronics, Information and Communication Engineers
Industrial property rights
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マルチモード干渉計からなるモード合分波器及び同時変換を可能とするモード変換器
相川 洋平
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９０度光ハイブリッド及び光復号装置
Yohei Aikawa
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光信号処理によるデコーダ
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相川 洋平
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相川 洋平
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相川 洋平
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相川 洋平
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相川 洋平, 大岸 智彦
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プッシュ型情報配信システム、情報受信端末およびコンピュータプログラム
永松 聡, 相川 洋平, 大岸 智彦
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相川 洋平, 大岸 智彦
Awards
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Education Award (Engineering Literacy)
2025.1 Institute of Science Tokyo, School of Engineering
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Editor's pick in Optics Continuum: All-optical 2-bit decoder based on a silicon waveguide device for BPSK-modulated signals
2024.4
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2022年度末松賞「ディジタル技術の基礎と展開」
2022.9 東京工業大学
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Student Research Award
2010.3 Tokyo Institute of Technology
Research Projects
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実用ビット数を指向した光ディジタル論理回路の実装
Grant number：26AN-408 2026.10 - 2028.9
公益財団法人 村田学術振興・教育財団 研究助成 自然科学
Authorship：Principal investigator Grant type：Competitive
Grant amount：\5000000 （ Direct Cost: \5000000 ）
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制御機構を不要とするノンブロッキングなモード変換光デバイス
2026.4 - 2028.3
Support Center for Advanced Telecommunications Technology Research
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A study on optical decoder based on linear optical interference enabling multibit operation
Grant number：25K08503 2025.4 - 2027.3
Japan Society for the Promotion of Science Grant in Aid for Scientific Research (C)
Yohei Aikawa
Authorship：Principal investigator
Grant amount：\4680000 （ Direct Cost: \3600000 、 Indirect Cost：\1080000 ）
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マルチモード干渉計型導波路を用いた超低遅延な光デコーダ
2024.4 - 2025.3
Yohei Aikawa
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Reconfiguable optical combination circuit base on linear optical effect
Grant number：23826579 2023.10 - 2026.3
Japan Science and Technology Agency
Yohei Aikawa
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Rising stars program
2023.9 - 2025.3
Yohei Aikawa
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A study on low latency and low power optical decoder for optoelectronic processors
Grant number：23K13676 2023.4 - 2025.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research
Yohei Aikawa
Authorship：Principal investigator Grant type：Competitive
Grant amount：\4680000 （ Direct Cost: \3600000 、 Indirect Cost：\1080000 ）
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Suematsu Award “Fundamentals and Developments of Digital Technology"
2022.9 - 2023.8
Yohei Aikawa
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A study on optical likelihood estimation for packet switching architecture in next generation
Grant number：21K14557 2021.4 - 2023.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists
Aikawa Yohei
Grant amount：\4680000 （ Direct Cost: \3600000 、 Indirect Cost：\1080000 ）
In this study, we investigated the technology of optical label recognition for multi-level modulation signals with the aim of realizing a memory-free packet switch. Specifically, we proposed a method to generate an optical signal which shows how far it is like a predetermined code string consisting of QPSK-modulated signals. We fabricated a prototype device of optical label recognition, which is provided by a silicon-based optical waveguide structure. Using this device, we successfully demonstrated the identification for 4-bit QPSK labels, and further demonstrated that the same device can identify labels for optical signals with different modulation schemes. We believe that we have contributed to the establishment of elemental technologies for the memory-free packet switch.
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a study on integrated device of packet recognition technology based on optical signal processing
2020.7 - 2021.6
The Murata Science Foundation
Yohei AIKAWA
Authorship：Principal investigator Grant type：Competitive
Grant amount：\2960000 （ Direct Cost: \2960000 ）
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A study on integrated optical comparator for future packet switching
2019.10 - 2020.9
The Mazda Foundation
Yohei AIKAWA
Authorship：Principal investigator Grant type：Competitive
Grant amount：\1000000 （ Direct Cost: \1000000 ）
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A study on optical packet switching by using optical comparison operation
2019.4 - 2020.3
Tateisi Science and Technology Foundation
Yohei AIKAWA
Authorship：Principal investigator Grant type：Competitive
Grant amount：\2679000 （ Direct Cost: \2435000 、 Indirect Cost：\244000 ）
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A study on comparator by using optical signal processing
2019.4 - 2020.3
The Telecommunications Advancement Foundation
Yohei AIKAWA
Authorship：Principal investigator Grant type：Competitive
Grant amount：\1525000 （ Direct Cost: \1372000 、 Indirect Cost：\152500 ）
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A study on optical switching based on optical signal processing
2019.4 - 2020.3
Yohei AIKAWA
Authorship：Principal investigator Grant type：Competitive
Grant amount：\2200000 （ Direct Cost: \2200000 ）
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A study on comparison operation by using optical signal processing
2018.4 - 2020.3
THE ASAHI GLASS FOUNDATION
Yohei AIKAWA
Authorship：Principal investigator Grant type：Competitive
Grant amount：\2000000 （ Direct Cost: \2000000 ）
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A study on comparator by using optical signal processing
2018.4 - 2019.3
The Telecommunications Advancement Foundation
Yohei AIKAWA
Authorship：Principal investigator Grant type：Competitive
Grant amount：\920000 （ Direct Cost: \828000 、 Indirect Cost：\92000 ）
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光演算による最尤復号処理に着目した光誤り訂正技術の確立
2014.4 - 2017.3
日本学術振興会 特別研究員奨励費
相川 洋平
Authorship：Principal investigator Grant type：Competitive
Grant amount：\3200000 （ Direct Cost: \3200000 ）
Teaching Experience
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Engineering Literacy
2023.4 Institution：Titech
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Electrical and Electronic Engineering Laboratory II
2023.4 Institution：Titech
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Kosen seminar
2018.4 - 2022.3 Institution：NIT,Okinawa College
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Applied mathematics
2018.4 - 2022.3 Institution：NIT,Okinawa College
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Computer engineering II
2018.3 - 2022.3 Institution：NIT,Okinawa College
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Information and communication engineering experiment - basic
2017.4 - 2022.3 Institution：NIT,Okinawa College
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Information and communication engineering experiment I
2017.4 - 2022.3 Institution：NIT,Okinawa College
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Information and communication engineering experiment II
2017.4 - 2022.3 Institution：NIT,Okinawa College