"Precise broadband characterization of optoelectronic devices using optical two-tone signal-based second- and third-order nonlinearity measurements"
Haruka Matsunaga, Yoji Orihara, Tetsuya Kawanishi
IEICE Electronics Express, Vol.21, No.1, 1-6
2025

「ミリ波・テラヘルツ波における散乱測定システム及び確率汎関数法による理論解析」
吉野理玖,朝倉義秀,吉田利哉,大墻新,金谷智彦,チャカロタイジェドヴィスノプ,実野邦久,川西哲也
電子情報通信学会論文誌C Vol.J107–C No.12 pp.366–373 ©一般社団法人電子情報通信学会
2024
DOI:10.14923/transelej.2024JCI0008

"THz Communications and the Demonstration in the ThoR–Backhaul Link"
Thomas Kürner, Ralf-Peter Braun, Guillaume Ducournau, Uwe Hellrung, Akihiko Hirata, Shintaro Hisatake, Laurenz John , Bo Kum Jung,Ingmar Kallfass, Tetsuya Kawanishi, Keitarou Kondou, Yigal Leiba, Bruce Napier, Ran Timar, Alexandre Renau, Peter Schlegel, Pascal Szriftgiser, Axel Tessmann, and Dominik Wrana
IEEE Transactions on Terahertz Science and Technology, vol. 14, no. 5, pp. 554-567
Sept. 2024
DOI:10.1109/TTHZ.2024.3415480

“Thermal Study for High-Photocurrent Photodetector in Non-Saturation Region Using Thin Substrate,Thin Absorber, and Flip-Chip Bonding Process”
Yaofeng Yi, Toshimasa Umezawa, Kouichi Akahane, Tetsuya Kawanishi
IEEE Access, vol. 12, pp. 56414-56421
2024
DOI:10.1109/ACCESS.2024.3391336

Thomas Kürner, Ralf-Peter Braun, Guillaume Ducournau, Uwe Hellrung, Akihiko Hirata, Shintaro Hisatake, Laurenz John, Bo Kum Jung, Ingmar Kallfass, Tetsuya Kawanishi, Keitarou Kondou, Yigal Leiba, Bruce Napier, Ran Timar, Alexandre Renau, Peter Schlegel, Pascal Szriftgiser, Axel Tessmann, and Dominik Wrana, “THz Communications and the Demonstration in the ThoR-Backhaul Link,” IEEE Transactions on Terahertz Science and Technology, vol. 14, no. 5, pp. 554-567, Sep. 2024, 10.1109/TTHZ.2024.3415480

“THz Communications and the Demonstration in the ThoR-Backhaul Link”
Thomas Kürner, Ralf-Peter Braun, Guillaume Ducournau, Uwe Hellrung, Akihiko Hirata, Shintaro Hisatake, Laurenz John, Bo Kum Jung, Ingmar Kallfass, Tetsuya Kawanishi, Keitarou Kondou, Yigal Leiba, Bruce Napier, Ran Timar, Alexandre Renau, Peter Schlegel, Pascal Szriftgiser, Axel Tessmann, and Dominik Wrana
IEEE Transactions on Terahertz Science and Technology, vol. 14, no. 5, pp. 554-567,
Sep. 2024
DOI: 10.1109/TTHZ.2024.3415480

"Handbook of Radio and Optical Networks Convergence"
ISBN-13 978-9819722815

「6Gの実現に向けたテラヘルツ通信の最新動向」
川西哲也
IEICE 通信ソサイエティマガジン, No. 70, pp. 117-125
2024

Tetsuya Kawanishi, (Ed.), “Handbook of Radio and Optical Networks Convergence”, Springer, ‎October 3, 2024, ISBN 978-9819722815

川西哲也編著, “Handbook of Radio and Optical Networks Convergence”, Springer, ‎October 3, 2024, ISBN 978-9819722815（Living reference work）

“Investigation of device length dependence of 1.55-µm-band QD-RSOA in threshold current of SiPh-based heterogeneous tunable laser”
T. Matsuki, A. Matsumoto, S. Nakajima, T. Umezawa, C.H. Cheng, K. Akahane, N. Yamamoto, and T. Kawanishi,
Proceeding of Compound Semiconductor Week (CSW2024), 7176-A-2451, 2024.
2024/6/5

"Radio propagation emulation using radio over multi-mode fiber systems"
Atsushi Kanno and Tetsuya Kawanishi
IEEE CAMA2024, DaNang, Vietnam
2024/10/10

“High-Speed Photonic Device Technology in Mobile FSO Transceiver”
(Keynote speech) Toshimasa Umezawa,
IEEE-VTC2024 in Singapore
2024/6/24

"Radiation Pattern Characterization of a 300 GHz Transceiver Installed Outdoor Using Motorized Pan-Tilt Heads"
Yusuke Tanaka, Shintaro Hisatake, Kota Miyake, Tetsuya Kawanishi, Arata Ogaki, Kunihisa Jitsuno, Masataka Sugiyama
CAMA2024, Da Nang
2024/10/10

“DC–226 GHz well-impedance-matched high-speed photoreceiver for multi-band signal detection”
T.Umezawa1, P.T. Dat, Y. Yoshida, S. Nakajima, A. Matsumoto, K. Akahane, A. Kanno and N. Yamamoto
OFC 2024
2024/3/26

"Evaluation of Power Delay Profiles in the Vicinity of Human Body at 300GHz Band"
Kai Nakamura and Akihiko Hirata
2024 International Symposium on Antennas and Propagation (ISAP 2024)
Incheon, Republic of Korea
2024/11/7

「空間光通信に向けた大口径受光デバイス技術」（招待講演）
梅沢　俊匡，Zu-Kai Weng, 吉田　悠来、赤羽　浩一、山本　直克
2025年1月レーザー学会
2025/1/21

"High performance quantum dot lasers"
Kouichi Akahane
Global Photonics, Optics and Lasers Conference, 2024
2024/9/19

"Precise Optical Modulation Technology for Measurement Applications"
Tetsuya Kawanishi
The 29th MICROOPTICS CONFERENCE (MOC2024)
2024.9.29-10.02, 講演2024.9.30

"300GHz outdoor transceiver based on IEEE802.15.3d"
Tetsuya Kawanishi, Arata Ogaki, Kunihisa Jitsuno, Masataka Sugiyama, Shitaro Hisatake, Yusuke Tanaka and Kota Miyake
2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Perth, Australia
2024.9.1-6, 発表2024.9.4

「Photon-Trap構造を用いた高速・高感度フォトディテクタ―の設計」
Shun Harada（原田瞬）
電子情報通信学会, 東京都市大学世田谷キャンパス
2025.03.27

"40 mA High-Current Photodetector Operating at 43 GHz and Thermal Study of its Critical Point and Temperature Variations"
YAOFENG YI
MWP 2024, Pisa, Italy
2024.9.17

“Multijunction-type PIN photodetector with pinhole reflection for optical communication applications”
Umezawa. T, Nakajima. S, Matsumoto. A, Akahane. K, and Yamamoto. N
Compound Semiconductor Week 2024 in Lundo　
2024/6/6

"Impact of Severe Weather Conditions on THz-wave Power with 300 GHz Radio Units"
Kota NAGASAWA
CAMA2024,ベトナム,ダナン,
2024.10.10
https://yz-jsjc-gov-cn-1416.res.gxlib.org.cn:443/rwt/1416/https/GIZDENDJMWTXKZ5BNWRT655TMH/

"Photonics-based millimeter- and THz wave visualization and its applications"
Shintro Hisatake
AES2024, Roma
2024/6/25

“Multi-junction type large-aperture high-speed PIN-PD and its characteristics for optical wireless communications”
Toshimasa Umezawa, Atsushi Matsumoto, Atsushi Kanno, Kouich Akahane, and Naokatsu Yamamoto
CLEO2024, SM1I.7
2024/5/6

"Seamless Convergence of Radio and Optical Systems for 6G and Beyond"
Atsushi Kanno
ICPS2024 Bangkok, Bangkok, Thailand
2024/12/9

「100GHz/300GHz 帯における散乱ブリュースター角の基礎検討と非対称散乱の観測」
Sho SAITO（齋藤匠）
マイクロ波テラヘルツ光電子技術研究会（MWPTHz）
姫路市文化コンベンションセンター
2025.01.23

「中央配置過飽和吸収体量子ドットモードロックレーザの特性評価」
簗瀬 智史、赤羽 浩一、松本 敦、梅沢 俊匡、山本 直克、前田 智弘、外林 秀之
第85回応用物理学会秋季学術講演会、20p-A35-3
2024/9/20

"Polarization Dependence on Delay Profile in a Conference Room at 150 and 300 GHz"
Akihiko Hirata and Keizo Cho
2024 International Symposium on Antennas and Propagation (ISAP 2024)
Incheon, Republic of Korea
2024/11/7

"Connection Ratio Improvement for 300-GHz-Band Wireless Links during Local Downpours via Link Disconnection Prediction"
Keisuke Yanai and Akihiro Hirata
2024 International Symposium on Antennas and Propagation (ISAP 2024), Incheon, Republic of Korea
2024/11/7

“Microwave to THz-wave Generation using Ultra-Broadband Photodetector”
Toshimasa Umezawa, Shinya Nakajima, Atsushi Matsumoto, Kouich Akahane, and Naokatsu Yamamoto,
IEEE-CAMA2024
2024/10/10

「ミリ波帯固定無線システムのネットワーク制御へ向けた無線テレメトリの検討」
菅野敦史、翁祖楷、川西哲也
光電波ワークショップ、小樽市民会館
2024/7/11

"Enhanced Performance of 1.55-μm-Band QD-RSOA by Improving Injection Current Uniformity and Heat Dissipation through Wire Bonding"
T. Matsuki, A. Matsumoto, S. Nakajima, T. Umezawa, C.H. Cheng, K. Akahane, N. Yamamoto, and T. Kawanishi
Proceeding of International Semiconductor Laser Conference(ISLC2024), P11, 2024.
2024/10/1
https://yz-jsjc-gov-cn-1416.res.gxlib.org.cn:443/rwt/1416/https/NFTXK3JNNF3XZZ3PN73GH/

"Outdoor THz Radio units with Weather and Temperature Sensors for Long-term Measurement"
Arata OGAKI
CAMA2024, ベトナム,ダナン
2024.10.10

"Design of dependable THz transmitters under severe weather conditions"
Tetsuya Kawanishi
2024 24th International Conference on Transparent Optical Networks (ICTON), Bari, Italy
2024.7.14-18, 講演2024.7.17

「不規則表面によるテラヘルツ波散乱測定におけるアンテナゲインの影響」
Riki NISHIDONO（西殿力基）
マイクロ波テラヘルツ光電子技術研究会（MWPTHz）, 姫路市文化コンベンションセンター
2025.01.23

"Coverage Analysis of Indoor 300-GHz-Band MIMO Systems"
A. Hirata, H. Saito, R. Yokoyama and K. Cho
2024 4th URSI Atlantic Radio Science Meeting (AT-RASC), Meloneras, Spain
2024/5/21

"Dynamic Characteristics of Low Threshold 1.55-um-band Quantum Dot DFB-LD"
A. Matsumoto, R. Yabuki, S. Nakajima, T. Umezawa, S. Heinsalu, Y. Matsushima, K. Akahane, N. Yamamoto, and K. Utaka
Proceeding of CLEO2024, STu4C.4, 2024.
2024/5/7

"10-Gbit/s Close Proximity Communication in 120 GHz Band Sheet LAN Using Dielectric Sheet as Transmission Medium"
A. Hirata, Y. Komori, T. Nishihara, Y. Kawamoto and T. Nagatsuma
2024 IEEE/MTT-S International Microwave Symposium - IMS 2024, Washington, DC, USA
2024/6/19

"Link Switching Between LoS and NLoS Transmissions Over a 43 Meter Distance at 300 GHz Using Motorized Pan-Tilt Heads"
Shintaro Hisatake, Yusuke Tanaka, Kota Miyake, Tetsuya Kawanishi, Arata Ogaki, Kunihisa Jitsuno, Masataka Sugiyama
IRMMW-THz2024, Perth
2024/9/4

”DC-220 GHz ultra-broad-band high-speed photodetector and its characterization”
Toshimasa Umezawa, Shinya Nakajima, Atsushi Matsumoto, Atsushi Kanno, Kouich Akahane, and Naokatsu Yamamoto
OECC 2024 in Melborn
2024/7/1

"Consideration on duplexing schemes for THz radio systems"
Tetsuya Kawanishi
4th URSI AT-RASC, Gran Canaria
2024.5.19-24, 発表2024.5.21

“200-GHz High-Power, High-Linearity, Photodetector for THz-Communication Applications in Beyond-5G”
Toshimasa Umezawa, Shinya Nakajima, Atsushi Matsumoto, Atsushi Kanno, Kouich Akahane, and Naokatsu Yamamoto
IRMMW 2024 in Perth
2024/9/3

"60-GHz-Bandwidth Silicon Optical Modulator Utilizing Electro-Optic Frequency-Domain Equalizer"
Yuya Yamaguchi, Atsushi Matsumoto, Pham Tien Dat, Shingo Takano, Yu Kataoka, Junichiro Ichikawa, Ryo Shimizu, Naokatsu Yamamoto, Kouichi Akahane, Atsushi Kanno, Tetsuya Kawanishi
Proceeding of ECOC2024, 2024
2024/9/25

「マイクロ波〜THz波帯マルチバンド信号発生に向けた超広帯域フォトディテクターの研究開発」
梅沢 俊匡、中島　慎也、松本　敦、赤羽 浩一、山本 直克
電子情報通信学会 MWP-THz 12月研究会
2024/12/20

"Highly stacked quantum dot mode-locked laser diode with 100 GHz mode spacing"
Kouichi Akahane, Atsushi Matsumoto, Satoshi Yanase, Toshimasa Umezawa, Naokatsu Yamamoto, Tomohiro Maeda, and Hideyuki Sotobayashi,
Proceedings of International Semiconductor Laser Conference （ISLC2024）
TuC3, 2024　
2024/10/1

"Clock-Data-Recovery-Based Delta-Sigma Modulation over Multi-Mode Fiber under Axis-Misalignment Condition"
Atsushi Kanno
MWP2024, Pisa, Italy
2024/9/18

"3rd International Conference and Expo on Lasers"
Kouichi Akahane, Mode-locked Laser Diode With Semiconductor Quantum Dot
Optics & Photonics, 2024
2024/10/21

「異種材料集積波長可変レーザのしきい値電流における1.55um帯QD-RSOAの素子長依存性の検討」
松木 太翼，松本 敦，中島 慎也，梅沢 俊匡，Chih-Hsien Cheng，赤羽 浩一，山本 直克，川西 哲也
第85回応用物理学会秋季学術講演会、18a-A34-6, 2024　
2024/9/18

「大型降雨設備を用いた300 GHz帯電波散乱基本特性測定」
Manato YAMADA（山田真透）　
マイクロ波テラヘルツ光電子技術研究会（MWPTHz), 姫路市文化コンベンションセンター
2025.01.23

"High-speed optical transmission technologies for in-vehicle networks"
Atsushi Kanno
POF2024, Tokyo
2024/11/11

「高速2次元PDアレー上のマイクロレンズ集積化の検討」
Yoshihisa OHNUKI（大貫芳久）
電子情報通信学会, 東京都市大学世田谷キャンパス
2025.03.27

"Wide range control of quantum dot density for optical fiber communication systems"
Kouichi Akahane
International Conference on Molecular Beam Epitaxy, MO-A3-01, 2024　
2024/9/9

"1550-nm-Band Quantum Dot Distributed Bragg Reflector Laser Using Intermixing Monolithic Integration"
A. Matsumoto, R. Yabuki, S. Nakajima, S. Heinsalu, T. Umezawa, K. Akahane, Y. Matsushima, N. Yamamoto, and K. Utaka
Proceeding of OECC2024, #284, 2024
2024/7/4

TUBS-Japanese Team Joint Workshop
Germany, Braunschweig, Technical University of Braunschweig
2024/11/25～2024/11/26

USTUTT-Japanese Team Joint Workshop
Germany, Stuttgart, University of Stuttgart
2024/11/28

Symposium on Radio and Optical Networks Convergence: Expectations and Challenges in Practical Applications
早稲田大学西早稲田キャンパス
2025/3/3

2024 Waseda University Research Award (Leading Research) Award
Tetsuya KAWANISHI and five others
2025/3/19

IEEE AP-S Industrial Engineering Paper Award on Antenna Measurements and Applications
Atsushi Kanno and three others
2024/10/11

IEICE Electronics Society Award
Atsushi Kanno and three others
2024/9/26

The 69th Maejima Hisoka Award
Toshimasa Umezawa and four others
2024/4/11