Kiyoto Takahata

Profile Information

Affiliation: Associate Professor, Faculty of Science and Engineering Graduate School of Information, Production, and Systems, Waseda University

Researcher number: 40780797
J-GLOBAL ID: 201601007589883207
researchmap Member ID: 7000017450

Research Interests

Research Areas

Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Electronic devices and equipment /

Papers

129

Numerical Demonstration of Silicon Micro-Ring Modulator with X-Interleaved PN Junction for High Modulation Efficiency

Wenkai Yang, Deji Li, Takaaki Kakitsuka, Kiyoto Takahata

2023 Asia Communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings (ACP/POEM), Nov 4, 2023
Theoretical analysis of dispersion-tolerant single-drive mixed amplitude-frequency modulation lasers

Takaaki Kakitsuka, Kiyoto Takahata

2022 28th International Semiconductor Laser Conference (ISLC), Oct 16, 2022
Over-67-GHz-bandwidth Membrane InGaAlAs EADFB Laser on Si Platform

Tatsurou Hiraki, Takuma Aihara, Yoshiho Maeda, Takuro Fujii, Tomonari Sato, Tai Tsuchizawa, Kiyoto Takahata, Takaaki Kakitsuka, Shinji Matsuo

Optical Fiber Communication Conference (OFC) 2022, M3D.2, Mar, 2022 Peer-reviewed
Over-67-GHz-bandwidth Membrane InGaAlAs Electro-absorption Modulator Integrated with DFB Laser on Si Platform

Tatsurou Hiraki, Takuma Aihara, Yoshiho Maeda, Takuro Fujii, Tomonari Sato, Tai Tsuchizawa, Kiyoto Takahata, Takaaki Kakitsuka, Shinji Matsuo

Journal of Lightwave Technology, 1-7, 2022
Membrane InP-based Modulator and Laser on Si

Tatsurou Hiraki, Takuma Aihara, Takuro Fujii, Koji Takeda, Yoshiho Maeda, Tai Tsuchizawa, Takaaki Kakitsuka, Kiyoto Takahata, Shinji Matsuo

2021 IEEE 17th International Conference on Group IV Photonics (GFP), WA2, Dec, 2021 Invited
60-GHz-bandwidth O-band Membrane InGaAlAs Electro-Absorption Modulator on Si Platform

Takuma Aihara, Tatsurou Hiraki, Yoshiho Maeda, Takuro Fujii, Tai Tsuchizawa, Kiyoto Takahata, Takaaki Kakitsuka, Shinji Matsuo

2021 IEEE 17th International Conference on Group IV Photonics (GFP), WA1, Dec, 2021 Peer-reviewed
Product-sum photonic integrated circuit based on microring resonators and MMI coupler on SOI

Ruikang Luo, Kiyoto Takahata

Proceedings of the International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD, 2021-September 127-128, Sep 13, 2021 Peer-reviewed
50-GHz-bandwidth Membrane InGaAsP Electro-absorption Modulator on Si Platform

Tatsurou Hiraki, Takuma Aihara, Yoshiho Maeda, Takuro Fujii, Tai Tsuchizawa, Kiyoto Takahata, Takaaki Kakitsuka, Shinji Matsuo

Journal of Lightwave Technology, 39(16) 5300-5306, May, 2021 Peer-reviewed
"Vertical optical waveguide comprising square base cuboid cores with size modulation for multilayer chip-to-chip interconnection "

Songping Ran, Takaaki Kakitsuka, Kiyoto Takahata

Proc. of the 8th International Conference on Photonics, Optics and Laser Technology (PTOTOPTICS 2020) ,, 174-179, 2020 Peer-reviewed
"50-GHz-bandwidth Electro-absorption Modulator with Membrane InGaAsP Lateral p-i-n Diode on Si Platform"

T. Hiraki, T. Aihara, Y. Maeda, T. Fujii, T. Tsuchizawa, K. Takahata, T. Kakitsuka, S. Matsuo

European Conference on Optical Communication (ECOC2020), Tu1B-4, 2020 Peer-reviewed
"Edge Model Embedding Method for Planar Filter Synthesis "

Kosuke Katayama, Kiyoto Takahata, Takashi Ohsawa, Takaaki Baba

RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP), 502-505, 2019 Peer-reviewed
"New evaluation method of crosstalk penalty for PAM4 signals "

Siyuan Duan, Hanzhi Chen, Qiang Du, Kiyoto Takahata

Asia Communications and Photonics Conference (ACP2019), M4A.269, 2019 Peer-reviewed
"A waveguide-based bidirectional optical delay unit with Bragg reflectors "

Chenge Ao, Ruikang Luo, Kiyoto Takahata

Asia Communications and Photonics Conference (ACP2019), M4A.288, 2019 Peer-reviewed
30-km Error-Free Transmission of Directly Modulated DFB Laser Array Transmitter Optical Sub-Assembly for 100-Gb Application

Shigeru Kanazawa, Wataru Kobayashi, Yuta Ueda, Takeshi Fujisawa, Kiyoto Takahata, Tetsuichiro Ohno, Toshihide Yoshimatsu, Hiroyuki Ishii, Hiroaki Sanjoh

JOURNAL OF LIGHTWAVE TECHNOLOGY, 34(15) 3646-3652, Aug, 2016 Peer-reviewed
Compact Hybrid-Integrated 100-Gb/s TOSA Using EADFB Laser Array and AWG Multiplexer

Takaharu Ohyama, Yoshiyuki Doi, Wataru Kobayashi, Shigeru Kanazawa, Takuya Tanaka, Kiyoto Takahata, Atsushi Kanda, Takeshi Kurosaki, Tetsuichiro Ohno, Hiroaki Sanjoh …

IEEE PHOTONICS TECHNOLOGY LETTERS, 28(7) 802-805, Apr, 2016 Peer-reviewed
Compact Hybrid Integrated 100-Gb/s Transmitter Optical Sub-Assembly Using Optical Butt-Coupling Between EADFB Lasers and Silica-Based AWG Multiplexer

Takaharu Ohyama, Yoshiyuki Doi, Wataru Kobayashi, Shigeru Kanazawa, Kiyoto Takahata, Atsushi Kanda, Takeshi Kurosaki, Takuya Tanaka, Tetsuichiro Ohno, Hiroaki Sanjoh …

JOURNAL OF LIGHTWAVE TECHNOLOGY, 34(3) 1038-1046, Feb, 2016 Peer-reviewed
Flip-Chip Interconnection Technique for Beyond 100-Gb/s (4 x 25.8-Gb/s) EADFB Laser Array Transmitter

Shigeru Kanazawa, Takeshi Fujisawa, Kiyoto Takahata, Yuta Ueda, Hiroyuki Ishii, Ryuzo Iga, Wataru Kobayashi, Hiroaki Sanjoh

JOURNAL OF LIGHTWAVE TECHNOLOGY, 34(2) 296-302, Jan, 2016 Peer-reviewedInvited
56-Gbaud 4-PAM (112-Gbit/s) operation of flip-chip interconnection lumped-electrode EADFB laser module for equalizer-free transmission

Shigeru Kanazawa, Takeshi Fujisawa, Kiyoto Takahata, Yasuhiko Nakanishi, Hiroshi Yamazaki, Yuta Ueda, Wataru Kobayashi, Yoshifumi Muramoto, Hiroyuki Ishii, Hiroaki Sanjoh

2016 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC), 2016 Peer-reviewed
Transmission of 214-Gbit/s 4-PAM signal using an ultra-broadband lumped-electrode EADFB laser module

Shigeru Kanazawa, Hiroshi Yamazaki, Yasuhiko Nakanishi, Takeshi Fujisawa, Kiyoto Takahata, Yuta Ueda, Wataru Kobayashi, Yoshifumi Muramoto, Hiroyuki Ishii, Hiroaki Sanjoh

2016 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC), 2016 Peer-reviewed
Low Driving Voltage Operation of MZI-Type EA Modulator Integrated With DFB Laser Using Optical Absorption and Interferometric Extinction

Yuta Ueda, Takeshi Fujisawa, Shigeru Kanazawa, Wataru Kobayashi, Kiyoto Takahata, Hiroaki Sanjoh, Hiroyuki Ishii, Masaki Kohtoku

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 21(6) 1501306, Nov, 2015 Peer-reviewed

Misc.

C-3-44 Study of Optical Butt-coupling Improvement between Silica-based Planar Lightwave Circuit and Spot-size Convertor Integrated Laser

Takahata Kiyoto, Ohyama Takaharu, Kobayashi Wataru, Doi Yoshiyuki, Sanjoh Hiroaki, Hashimoto Toshikazu

Proceedings of the IEICE General Conference, 2016(1) 182-182, Mar 1, 2016
C-4-15 4チャネル直接変調DFBレ-ザアレイTOSAの100Gbit/s動作(C-4.レ-ザ・量子エレクトロニクス,一般セッション)

Kanazawa S., Kobayashi W., Takahata K., Ishii H., Sanjoh H.

Proceedings of the IEICE General Conference, 2016(1) 219-219, Mar 1, 2016
C-4-14 Frequency response flattening of EADFB laser module using flip-chip interconnects

Kanazawa S., Ueda Y., Takahata K., Ishii H., Sanjoh H.

Proceedings of the Society Conference of IEICE, 2015(1) 151-151, Aug 25, 2015
C-3-45 100Gbit/s TOSA using optical butt-coupling between LD array and AWG

Ohyama T., Doi Y., Kobayashi W., Kanazawa S., Takahata K., Kanda A., Kurosaki T., Tanaka T., Ohno T., Sanjoh H. …

Proceedings of the Society Conference of IEICE, 2015(1) 119-119, Aug 25, 2015
C-3-55 Study of Multi-lane Optical System using Butt-coupling between Silica-based Planar Lightwave Circuit and Laser-diode with Spot-size Convertor

Ohyama Takaharu, Doi Yoshiyuki, Kobayashi Wataru, Tanaka Takuya, Kanazawa Sigeru, Takahata Kiyoto, Sanjoh Hiroaki, Hashimoto Toshikazu

Proceedings of the IEICE General Conference, 2015(1) 179-179, Feb 24, 2015
8 x 50-Gb/s EADFB laser array module using flip-chip interconnection technique

KANAZAWA Shigeru, FUJISAWA Takeshi, TAKAHATA Kiyoto, SANJOH Hiroaki, IGA Ryuzo, ISHII Hiroyuki

Technical report of IEICE. OCS, 114(281) 211-214, Oct 30, 2014
Low-voltage Operation of Mach-Zehnder Interferometer-type Electroabsorption Modulator integrated with DFB Laser Diode

UEDA Yuta, FUJISAWA Takeshi, KANAZAWA Shigeru, KOBAYSHI Wataru, TAKAHATA Kiyoto, SANJOH Hiroaki, ISHII Hiroyuki, Kohtoku Masaki

Technical report of IEICE. OCS, 114(281) 153-157, Oct 30, 2014
C-4-1 50 Gb/s x 8Ch operation with EADFB laser array module using flip-chip interconnects

Kanazawa S, Fujisawa T, Takahata K, Sanjoh H, Iga Ryuzo, Ishii H

Proceedings of the Society Conference of IEICE, 2014(1) 155-155, Sep 9, 2014
C-4-7 Very-Low-Voltage Operation of Mach-Zehnder Interferometer-Type Electroabsorption Modulator using Optical Absorption and Interferometric Extinction

Ueda Yuta, Fujisawa Takeshi, Kanazawa Shigeru, Kobayashi Wataru, Takahata Kiyoto, Sanjoh Hiroaki, Ishii Hiroyuki

Proceedings of the Society Conference of IEICE, 2014(1) 161-161, Sep 9, 2014
C-4-7 Very-Low-Voltage Operation of Mach-Zehnder Interferometer-Type Electroabsorption Modulator with Asymmetric Couplers

Ueda Y., Fujisawa T., Kanazawa S., Kobayashi W, Takahata K., Ishii H.

Proceedings of the IEICE General Conference, 2014(1) 243-243, Mar 4, 2014
An electroabsorption modulator integrated DFB laser array integrated with low-loss optical multiplexer for 100GbE

Fujisawa Takeshi, Kanazawa Shigeru, Ueda Yuta, Kobayashi Wataru, Takahata Kiyoto, Ohki Akira, Itoh Toshio, Kohtoku Masaki, Ishii Hiroyuki

Technical report of IEICE. LQE, 113(395) 135-140, Jan 23, 2014
An electroabsorption modulator integrated DFB laser array integrated with low-loss optical multiplexer for 100GbE

Fujisawa Takeshi, Kanazawa Shigeru, Ueda Yuta, Kobayashi Wataru, Takahata Kiyoto, Ohki Akira, Itoh Toshio, Kohtoku Masaki, Ishii Hiroyuki

113(396) 135-140, Jan 23, 2014
An electroabsorption modulator integrated DFB laser array integrated with low-loss optical multiplexer for 100GbE

Fujisawa Takeshi, Kanazawa Shigeru, Ueda Yuta, Kobayashi Wataru, Takahata Kiyoto, Ohki Akira, Itoh Toshio, Kohtoku Masaki, Ishii Hiroyuki

113(397) 135-140, Jan 16, 2014
100GbE transmitter optical sub-assembly (TOSA) using polarization multiplexing

Ohyama Takaharu, Ohki Akira, Takahata Kiyoto, Ito Toshio, Nunoya Nobuhiro, Fujisawa Takeshi, Kanazawa Shigeru, Iga Ryuzo, Sanjoh Hiroaki

Technical report of IEICE. LQE, 113(264) 75-80, Oct 24, 2013
InP-based reflection-type transversal filter for compact multiplexer of array-type monolithically integrated light source

Ueda Y, Fujisawa T, Takahata K, Kohtoku M, Ishii H

Proceedings of the Society Conference of IEICE, 2013(1) 171-171, Sep 3, 2013
Compact 100GbE Transmitter Optical Sub-Assembly using Polarization Multiplexing

Ohyama T, Ohki A, Takahata K, Ito T, Nunoya N, Fujisawa T, Kanazawa S, Iga R, Sanjoh H

Proceedings of the Society Conference of IEICE, 2013(1) 221-221, Sep 3, 2013
28Gbit/s X 4Ch operation with EADFB laser array module using flip-chip interconnects

Kanazawa S, Fujisawa T, Takahata K, Ohki A, Iga R, Ishii H

Proceedings of the Society Conference of IEICE, 2013(1) 222-222, Sep 3, 2013
Low-crosstalk and high-modulation bandwidth operation of flip-chip interconnection EADFB laser array module

KANAZAWA Shigeru, FUJISAWA Takeshi, TAKAHATA Kiyoto, OHKI Akira, IGA Ryuzo, ISHII Hiroyuki

IEICE technical report. Component parts and materials, 113(188) 31-34, Aug 29, 2013
C-10-10 A study of pre-emphasis circuit for 28-Gbit/s-class driver IC

Wakita Hitoshi, Nakamura Makoto, Fukuyama Hiroyuki, Tsunashima Satoshi, Kurishima Kenji, Kanazawa Shigeru, Fujisawa Tsuyoshi, Takahata Kiyoto

Proceedings of the IEICE General Conference, 2013(2) 70-70, Mar 5, 2013
An electroabsorption modulator integrated DFB laser for beyond 100G parallel LAN applications

FUJISAWA Takeshi, KANAZAWA Shigeru, TAKAHATA Kiyoto, OHKI Akira, UEDA Yuta, KOBAYASHI Wataru, IGA Ryuzo, SANJI Hiroaki, KOTOKU Masaki, ISHII Hiroyuki

Technical report of IEICE. OPE, 112(259) 97-101, Oct 18, 2012

Books and Other Publications

「電源不要な超小型光マイクロ波変換モジュール」月間EMC （2000年12月号）

髙畑清人, 福島誠治, 三田地成幸

科学情報出版, Dec, 2000

Presentations

Design of a photonic integrated circuit for product-sum computing

Ruikang Luo, Kiyoto Takahata

The 15th International collaboration Symposium on Information, Production and Systems (ISIPS 2021), B2-6, Nov 8, 2021
Dispersion engineering of kagome lattice Si photonic crystal waveguide

Deji Li, Kiyoto Takahata

The 15th International collaboration Symposium on Information, Production and Systems (ISIPS 2021), B2-3, Nov 8, 2021
Siプラットフォーム上O帯メンブレンInGaAlAs電界吸収型変調器

開達郎, 相原卓磨, 前田圭穂, 藤井拓郎, 佐藤具就, 硴塚孝明, 髙畑清人, 松尾慎治

第82回応用物理学会秋季学術講演会, 10p-N405-9, Sep, 2021
Siプラットフォーム上薄膜InGaAsP電界吸収型変調器

開達郎, 相原卓磨, 前田圭穂, 藤井拓郎, 土澤泰, 髙畑清人, 硴塚孝明, 松尾慎治

信学技報, OCS2020-41 OPE2020-73 LQE2020-79, Feb, 2021 Invited
Design of a Compact Silicon Electro-Optic Modulator Based-on Indium-Tin-Oxide Integrated Directional Coupler with Subwavelength Gratings

Hanzhi CHEN, Kaihang LU, Takaaki KAKITSUKA, Kiyoto TAKAHATA

The 14th International collaboration Symposium on Information, Production and Systems (ISIPS 2020), B3-5, Nov 12, 2020
Design of Mode Size Converter on SOI Waveguide for Improvement of Coupling Efficiency and Misalignment Tolerance with Single-mode Fiber

Liang DONG, Deji LI, Kiyoto TAKAHATA

The 14th International collaboration Symposium on Information, Production and Systems (ISIPS 2020), B3-2, Nov 12, 2020
New evaluation method of crosstalk penalty for multi-channel transmitters

Siyuan DUAN, Hanzhi CHEN, Kiyoto TAKAHATA

The 13th International collaboration Symposium on Information, Production and Systems (ISIPS 2019), B8-7, Nov 22, 2019
Bidirectional optical delay unit for 8-bit sereial-to-parallel conversion

Chenge AO, Ruikang LUO, Kiyoto TAKAHATA

The 13th International collaboration Symposium on Information, Production and Systems (ISIPS 2019), B8-2, Nov 22, 2019
A compact SOI-based polarization beam splitter

Jingyan Chang, Ye Bo, Kiyoto Takahata

Sep 29, 2019
Mode size converter on SOI waveguide for improvement of coupling with SMF

Liang DONG, Hao LI, Kiyoto TAKAHATA

Sep 29, 2019
Training Dataset Synthesis for Planar Filter Circuits Learning

Kosuke Katayama, Kiyoto Takahata, Takashi Ohsawa, Takaaki Baba

Sep 27, 2018
Design of multi-layer optical waveguide with a tapered cube core structure

Chonglun Cui, Songpin Ran, Takashi Ohsawa, Takaaki Baba, Kiyoto Takahata

Sep 26, 2018
Evaluation method of crosstalk penalty based on SNR analysis

Qiang Du, Liang Dong, Kiyoto Takahata

Sep 26, 2018
Analysis on crosstalk of a multi-channel optical transmitter

Xiangyu Gan, Chang Guo, Jingyan Chang, Kosuke Katayama, Takaaki Baba, Kiyoto Takahata

Sep 26, 2018
IEEE802.3における400GbE標準化の状況

髙畑清人

フォトニックデバイス・応用技術研究会, Oct 8, 2014, 光産業技術振興協会 Invited
ECOC2009 国際会議報告

髙畑清人

エイトラムダフォーラム, Oct 16, 2009, イーラムダネット Invited

Research Projects

自由空間電子走行型光電変換デバイスの創生とテラヘルツ波パルスビームの実現

Apr, 2020 - Mar, 2023
Study on an inter-channel crosstalk in a multi-channel optical transmitter module for multi-level pulse amplitude modulation.

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, Apr, 2017 - Mar, 2020

Takahata Kiyoto
光信号処理用全光シリアル-パラレル変換回路の研究

研究調査助成, 公益財団法人電気通信普及財団, Apr, 2019 - Mar, 2020
多値振幅変調用小型多チャネル光送信モジュールのチャネル間クロストークに関する研究

科研費, 基盤研究（C）, 独立行政法人日本学術振興会, Apr, 2017 - Mar, 2020

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