Novel Functionality and Material for Si-Photonics: Two-Photon Absorption Switching and Antimonide Hetero-Genius Epitaxy. - Tak-Keung Liang; Kouichi Akahane; Naokatsu Yamamoto; Luis Romeu Nunes; Tetsuya Kawanishi; Masahiro Tsuchiya (IEICE Trans. Electron., 2007)

Skew Dependence of Nanophotonic Devices Based on Optical Near-Field Interactions. - Makoto Naruse; Ferdinand Peper; Kouichi Akahane; Naokatsu Yamamoto; Tadashi Kawazoe; Naoya Tate; Motoichi Ohtsu (ACM J. Emerg. Technol. Comput. Syst., 2012)

10-GHz High-Repetition Optical Short Pulse Generation from Wavelength-Tunable Quantum Dot Optical Frequency Comb Laser. - Naokatsu Yamamoto; Kouichi Akahane; Tetsuya Kawanishi; Hideyuki Sotobayashi; Yuki Yoshioka; Hiroshi Takai (IEICE Trans. Electron., 2013)

Quantum dot two-mode laser at 1.55 μm-band for 90GHz radio over fiber applications. - Kouichi Akahane; Naokatsu Yamamoto; Atsushi Kanno; Toshimasa Umezawa; Tetsuya Kawanishi (ECOC, 2014)

Electro-optic devices for imaging systems using radio-over-fibre. - Tetsuya Kawanishi; Naokatsu Yamamoto; Toshimasa Umezawa; Kouichi Akahane; Atsushi Kanno; Pham Tien Dat (ICTON, 2014)

High-spectral efficiency millimeter wave-over-fiber system for future mobile fronthaul. - Pham Tien Dat; Atsushi Kanno; Keizo Inagaki; Naokatsu Yamamoto; Tetsuya Kawanishi (ECOC, 2015)

Bias free operational 107-Gbaud ultra-fast photodetector. - Toshimasa Umezawa; Kouichi Akahane; Naokatsu Yamamoto; Atsushi Kanno; Tetsuya Kawanishi (ECOC, 2015)

Advanced photonics for wired and wireless seamless networks. - Tetsuya Kawanishi; Atsushi Kanno; Pham Tien Dat; Atsushi Matsumoto; Naokatsu Yamamoto (ICTON, 2015)

5G transport and broadband access networks: The need for new technologies and standards. - Pham Tien Dat; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (Kaleidoscope, 2015)

Zero-bias operational ultra-broadband UTC-PD above 110 GHz for high symbol rate PD-array in high-density photonic integration. - Toshimasa Umezawa; Kouichi Akahane; Naokatsu Yamamoto; Atsushi Kanno; Keizo Inagaki; Tetsuya Kawanishi (OFC, 2015)

Multifunctional all-optical signal processing scheme for simultaneous multichannel WDM multicast and XOR logic gates based on FWM in QD-SOA. - Danshi Wang; Min Zhang 016; Guo-Wei Lu; Jun Qin; Takahide Sakamoto; Kouichi Akahane; Naokatsu Yamamoto; Tetsuya Kawanishi; Ze Li 007; Yue Cui (OFC, 2015)

Monolithically integrated quantum-dot optical modulator with semiconductor optical amplifier for 1.3µm waveband error-free 10-km-long transmission. - Naokatsu Yamamoto; Kouichi Akahane; Toshimasa Umezawa; Tetsuya Kawanishi (OFC, 2015)

WDM RoF-MMW and linearly located distributed antenna system for future high-speed railway communications. - Pham Tien Dat; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (IEEE Commun. Mag., 2015)

A 1.55-µm Waveband Optical Absorption Characterization of an Electro-Absorption Device with a Highly Stacked InAs/InGaAlAs Quantum Dot Structure. - Naokatsu Yamamoto; Kouichi Akahane; Toshimasa Umezawa; Tetsuya Kawanishi (IEICE Trans. Electron., 2015)

On the channel capacity of polarization-multiplexed coherent radio-over-fiber transmissions at millimeter-wave bands. - Yuki Yoshida; Y. Takami; S. Inudo; Ken-ichi Kitayama; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (ICC, 2016)

Radio-over-fibre based high-speed millimetre-wave backhaul system for high-speed trains. - Tetsuya Kawanishi; Atsushi Kanno; Pham Tien Dat; Naokatsu Yamamoto (ICTON, 2016)

High-capacity and high-spectral-efficiency seamless fiber-wireless system for high-speed trains. - Pham Tien Dat; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2016)

Mitigation of modal crosstalk-induced power fading in mode division multiplexed W-band RoF links. - Nikolaos P. Diamantopoulos; Y. Takami; Yuki Yoshida; Akihiro Maruta; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi; Ryu Maruyama; N. Kuwaki; Shinji Matsuo; Ken-ichi Kitayama (OFC, 2016)

All-spectrum fiber-wireless transmission for 5G backhaul and fronthaul links. - Atsushi Kanno; Pham Tien Dat; Naokatsu Yamamoto; Iwao Hosako; Yuki Yoshida; Ken-ichi Kitayama; Tetsuya Kawanishi (OFC, 2016)

31-GHz single-carrier, 44.6-Gbps photonic wireless transmission using a wide-bandwidth high power photodetector and a pre-distortion technique. - Toshimasa Umezawa; Kunihisa Jitsuno; Nobuhiko Shibagaki; Atsushi Kanno; Kouichi Akahane; A. Mstsumoto; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2016)

5G transport networks: the need for new technologies and standards. - Pham Tien Dat; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (IEEE Commun. Mag., 2016)

Transmission of multiband wireless signals over a seamless IM/DD fiber-MMW system. - Nguyen Van Toan; Pham Tien Dat; Atsushi Kanno; Naokatsu Yamamoto; Vo Nguyen Quoc Bao; Tetsuya Kawanishi (IEICE Electron. Express, 2016)

Optical Subcarrier Processing for Nyquist SCM via Coherent Spectrum Overlapping in FWM with Coherent Pump. - Guo-Wei Lu; Ruben S. Luis; Jose Manuel Delgado Mendinueta; Takahide Sakamoto; Naokatsu Yamamoto (ECOC, 2017)

Spatial Coherent Matched Detection Using High-Speed Two Dimensional Photo-Diode Array for Full-Channel Demultiplexing and Demodulation of Mode-Division-Multiplexed Signals. - Takahide Sakamoto; Toshimasa Umezawa; Guo-Wei Lu; Kouichi Akahane; Atsushi Matsumoto; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (ECOC, 2017)

Dense SDM 32-Pixel 2-D Photodetector Array. - Toshimasa Umezawa; Tadashige Sakamoto; Atsushi Kanno; Ken Kusakata; Kouichi Akahane; Atsushi Matsumoto; Naokatsu Yamamoto; Tetsuya Kawanishi (ECOC, 2017)

Linearized LiNbO3 Modulator with Dual Mach-Zehnder Interferometer and Branched Asymmetric CPW Electrode. - Yuya Yamaguchi; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi; Hirochika Nakajima (ECOC, 2017)

Concept of sensor over fibres and its application to high resolution millimetre-wave radar. - Tetsuya Kawanishi; Atsushi Kanno; Naokatsu Yamamoto (ICTON, 2017)

Simultaneous transmission of multi-RATs and mobile fronthaul in the MMW bands over an IFoF system. - Pham Tien Dat; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2017)

Silicon photonic wavelength-tunable lasers for high-capacity optical communication systems. - Tomohiro Kita; Hiroyuki Yamazaki; Naokatsu Yamamoto; Hirohito Yamada (OFC, 2017)

On the impact of Tomlinson-Harashima precoding in optical PAM transmissions for intra-DCN communication. - Kengo Matsumoto; Yuki Yoshida; Akihiro Maruta; Atsushi Kanno; Naokatsu Yamamoto; Ken-ichi Kitayama (OFC, 2017)

Ultrafast demultiplexing of optical time-division multiplexed signals by parallel opto-electronic time-frequency domain sampling. - Takahide Sakamoto; Guo-Wei Lu; Naokatsu Yamamoto (OFC, 2017)

100 GHz optical-to-radio converter module and its application in radio and power over fiber transmission through multi-core fiber. - Toshimasa Umezawa; Pham Tien Dat; Eiichi Hase; Kenichi Kashima; Atsushi Kanno; Kouichi Akahane; Atsushi Matsumoto; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2017)

Simple Self-Homodyne Detection Scheme for Optical OFDM With Inserted Pilot Subframes and Application in Optical Access Networks. - Guo-Wei Lu; Xun Guan; Takahide Sakamoto; Naokatsu Yamamoto; Calvin Chun-Kit Chan (IEEE Access, 2017)

Cell-Less Network for Handover-Free Communications to High-Speed Trains Using a Switched WDM Fiber-Wireless Backhaul. - Pham Tien Dat; Atsushi Kanno; Keizo Inagaki; Naokatsu Yamamoto; Tetsuya Kawanishi (ECOC, 2018)

1.6-Gbps LED-Based Ultraviolet Communication at 280 nm in Direct Sunlight. - Kazunobu Kojima; Yuki Yoshida; Masaki Shiraiwa; Yoshinari Awaji; Atsushi Kanno; Naokatsu Yamamoto; Shigefusa Chichibu (ECOC, 2018)

Frequency Up-Conversion of Data-Carrying Optical Vortex for Optical Fibre to Optical Wireless Communications Interface. - Guo-Wei Lu; Junichi Hamazaki; Keizo Inagaki; T. Kishimoto; Yuichi Ogawa; Norihiko Sekine; Akifumi Kasamatsu; Naokatsu Yamamoto; S. Yamaguchi; Iwao Hosako (ECOC, 2018)

400-Gbps Space Division Multiplexing Optical Wireless Communication Using Two-Dimensional Photodetector Array. - Toshimasa Umezawa; Takahide Sakamoto; Atsushi Kanno; Shinya Nakajima; Atsushi Matsumoto; Naokatsu Yamamoto; Tetsuya Kawanishi (ECOC, 2018)

Optical Modulator with the Digitized Transfer Function for Multilevel Amplitude Shift Keying. - Yuya Yamaguchi; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (ECOC, 2018)

90-GHz Linear-Cell Systems for Public Transportation Systems. - Tetsuya Kawanishi; Atsushi Kanno; Naokatsu Yamamoto (ICTON, 2018)

High-Speed and Handover-Free Communications for High-Speed Trains Using Switched WDM Fiber-Wireless System. - Pham Tien Dat; Atsushi Kanno; Keizo Inagaki; Toshimasa Umezawa; François Rottenberg; Jérôme Louveaux; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2018)

Radio-over-Fiber-based Seamless Fiber-Wireless Convergence for Small Cell and Linear Cell Networks. - Pham Tien Dat; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2018)

Full-Duplex and Scalable MIMO Fiber-Wireless Seamless System in W-Band for Future Mobile Networks. - Pham Tien Dat; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2018)

High-speed Two-dimensional Photodetector Array for 4-WDM 25-Gbaud FSO Communication. - Toshimasa Umezawa; Takahide Sakamoto; Atsushi Kanno; Kouichi Akahane; Atsushi Matsumoto; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2018)

Radio over multimode fiber system for short-reach radio relay links. - Atsushi Kanno; Naokatsu Yamamoto (PSC, 2018)

Integrated Fiber-Wireless System in W Band for Ultra-Dense Small-Cell and Moving-Cell Network. - Pham Tien Dat; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (GLOBECOM Workshops, 2019)

Hybrid Optical Wireless-mmWave: Ultra High-Speed Indoor Communications for Beyond 5G. - Pham Tien Dat; Atsushi Kanno; Keizo Inagaki; Toshimasa Umezawa; Naokatsu Yamamoto; Tetsuya Kawanishi (INFOCOM Workshops, 2019)

Full-Duplex Transmission of Nyquist-SCM Signal over a Seamless Bidirectional Fiber-Wireless System in W-Band. - Pham Tien Dat; Atsushi Kanno; Naokatsu Yamamoto; Nguyen Van Dien; Nguyen Tan Hung; Tetsuya Kawanishi (OFC, 2019)

Field Trial of 1.5-Gbps 97-GHz Train Communication System Based on Linear Cell Radio Over Fiber Network for 240-km/h High-Speed Train. - Atsushi Kanno; Pham Tien Dat; Toshimasa Umezawa; Naokatsu Yamamoto; Tetsuya Kawanishi; Nagateru Iwasawa; Nariya Iwaki; Kazuki Nakamura; Kunihiro Kawasaki; Naoki Kanada; Naruto Yonemoto; Yosuke Sato; et al. (OFC, 2019)

1-λ, 16-Parallel Lanes, 50-Gbaud On-Off Keying Multi-Core Fiber Communication Directly Coupled to High Speed 2D-Photodetector Array. - Toshimasa Umezawa; Atsushi Matsumoto; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2019)

Coherent Detection Only by 2-D Photodetector Array: A Discreteness-Aware Phase Retrieval Approach. - Yuki Yoshida; Toshimasa Umezawa; Atsushi Kanno; Naokatsu Yamamoto (OFC, 2019)

Evaluation of Bend-Insensitive Plastic and Glass Fiber for 28-GHz RF Transmission. - Takamitsu Aiba; Hiroki Yasuda; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi; Tomohiro Wakabayashi (OECC/PSC, 2019)

Dual-Parallel Mach-Zehnder Modulator Integrated with 180-degree Hybrid for Compensation of Third-Order Intermodulation Distortion. - Daichi Furubayashi; Yuta Kashiwagi; Tadashi Kawai; Akira Enokihara; Naokatsu Yamamoto; Tetsuya Kawanishi (OECC/PSC, 2019)

Characterization of 2D high-speed photodetector array device for SDM fiber communication applications. - Ken Kusakata; S. Takamizawa; Toshimasa Umezawa; Naokatsu Yamamoto; Tetsuya Kawanishi (OECC/PSC, 2019)

Simultaneous Compensation of Fiber Nonlinearity and Dispersive Fading Effects by Conjugated-Paired Radio-on-Fiber Transmission with Phase-Shifted Dual-Sideband Downconversion. - Takahide Sakamoto; Guo-Wei Lu; Naokatsu Yamamoto; Tetsuya Kawanishi (OECC/PSC, 2019)

Experimental Evaluation of Wavelength-Dependence of Thin-Film LiNbO3 Modulator with an Extinction-Ratio-Tunable Structure. - Yuya Yamaguchi; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (OECC/PSC, 2019)

Design of Optical Receiver for 28 GHz RF Transmission over Multi-mode Fiber. - Hiroki Yasuda; Takamitsu Aiba; Satoshi Tanaka; Toshinori Suzuki; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi; Tomohiro Wakabayashi (OECC/PSC, 2019)

132 Gb/s 3×3 Full MIMO Fiber-Wireless Seamless System in W Band Using WDM/PDM RoF Transmission. - Pham Tien Dat; François Rottenberg; Atsushi Kanno; Keizo Inagaki; Jérôme Louveaux; Naokatsu Yamamoto; Tetsuya Kawanishi (ECOC, 2020)

30 GHz Radio over FSO System using High Speed 2D-PDA and Its Optical Path Switching Performance. - Toshimasa Umezawa; Pham Tien Dat; Atsushi Kanno; Kunihisa Jitsuno; Naokatsu Yamamoto; Tetsuya Kawanishi (ECOC, 2020)

Up-to 292-Mbps Deep-UV Communication over a Diffuse-Line-of-Sight Link Based on Silicon Photo Multiplier Array. - Yuki Yoshida; Kazunobu Kojima; Masaki Shiraiwa; Atsushi Kanno; Akira Hirano; Yosuke Nagasawa; Masamichi Ippommatsu; Naokatsu Yamamoto; Shigefusa Chichibu; Yoshinari Awaji (ECOC, 2020)

Single-Pixel IQ Monitor via Computational Coherent Reception with Widely Linear Phase Retrieval. - Yuki Yoshida; Takahito Tanimura; Setsuo Yoshida; Takeshi Hoshida; Naokatsu Yamamoto (ECOC, 2020)

Phase-Retrieving Coherent Reception and its Sample Complexity. - Yuki Yoshida; Toshimasa Umezawa; Atsushi Kanno; Naokatsu Yamamoto (ECOC, 2020)

Demonstration of Indoor 5G Fronthaul over Legacy Multimode Fiber Enabled by Real-time Analog-to-digital Compression (ADX). - Paikun Zhu; Yuki Yoshida; Atsushi Kanno; Naokatsu Yamamoto; Ken-ichi Kitayama (ECOC, 2020)

High-Speed Radio-on-Free-Space Optical Mobile Fronthaul System for Ultra-Dense Radio Access Network. - Pham Tien Dat; Atsushi Kanno; Keizo Inagaki; François Rottenberg; Jérôme Louveaux; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2020)

High Speed 2D-PDA FSO Receiver for High Optical Alignment Robustness with Space Diversity. - Toshimasa Umezawa; Yuki Yoshida; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2020)

On the Sample Complexity of Phase-Retrieval Receiver Based on 2-D Arrayed Photodetectors. - Yuki Yoshida; Toshimasa Umezawa; Atsushi Kanno; Keizo Inagaki; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2020)

Variable-linewidth light source based on Brownian motion random walk in optical phase. - Jun Mochizuki; Keizo Inagaki; Guo-Wei Lu; Takahide Sakamoto; Yuki Yoshida; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (IEICE Electron. Express, 2020)

Electro-Optic Modulator for Compensation of Third-Order Intermodulation Distortion Using Frequency Chirp Modulation. - Daichi Furubayashi; Yuta Kashiwagi; Takanori Sato; Tadashi Kawai; Akira Enokihara; Naokatsu Yamamoto; Tetsuya Kawanishi (IEICE Trans. Electron., 2020)

Submillimeter Large High-speed Photodetector for High Optical Alignment Robustness Optical Wireless Communications. - Toshimasa Umezawa; Shinya Nakajima; Atsushi Kanno; Naokatsu Yamamoto (ECOC, 2021)

1024-QAM Analog Waveform Transmission Over a Seamless Fiber-Wireless System in W Band. - Pham Tien Dat; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (INFOCOM Workshops, 2021)

Transparent Fiber-Radio-Fiber Bridge at 101 GHz using Optical Modulator and Direct Photonic Down-Conversion. - Pham Tien Dat; Yuya Yamaguchi; Keizo Inagaki; Masayuki Motoya; Satoshi Oikawa; Junichiro Ichikawa; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2021)

240-Gbps SDM-FSO communication using 4-bundle fiber and 2D photodetector array. - Toshimasa Umezawa; Kunio Jitsuno; Naokatsu Yamamoto; Tetsuya Kawanishi (OFC, 2021)

Demonstration of 28-GHz Band Radio Signal Transmission into Vehicle by Analog Radio over Multi-Mode Fiber. - Hiroki Yasuda; Toshinori Suzuki; Hsuan-Yun Kao; Satoshi Tanaka; Shota Ishimura; Kazuki Tanaka; Naokatsu Yamamoto; Atsushi Kanno; Ryo Inohara; Kosuke Nishimura; Takamitsu Aiba; Tomohiro Wakabayashi; et al. (OFC, 2021)

Simultaneous Monitoring of Frequency-dependent IQ Imbalances in a Dual-polarization IQ Modulator by using a Single Photodetector: A Phase Retrieval Approach. - Yuki Yoshida; Setsuo Yoshida; Shoichiro Oda; Takeshi Hoshida; Naokatsu Yamamoto (OFC, 2021)

400-pixel high-speed photodetector for high optical alignment robustness FSO receiver. - Toshimasa Umezawa; Atsushi Matsumoto; Kouichi Akahane; Atsushi Kanno; Naokatsu Yamamoto (OFC, 2022)

Proposal for a Highly Reliable In-Vehicle Optical Network: SiPhON (Si-Photonics-Based In-Vehicle Optical Network). - Hiroyuki Tsuda; Ryogo Kubo; Tatsuo Furuya; Masayuki Iwase; Masahito Morimoto; Hisashi Kondo; Yasushi Amamiya; Yoshiaki Nakano; Takuo Tanemura; Masayuki Murata 001; Shin'ichi Arakawa; Naokatsu Yamamoto; et al. (OECC/PSC, 2022)

Mach-Zehnder Optical Modulator Integrated with Tunable Multimode Interference Coupler of Ti:LiNbO3 Waveguides for Controlling Modulation Extinction Ratio. - Anna Hirai; Yuichi Matsumoto; Takanori Sato; Tadashi Kawai; Akira Enokihara; Shinya Nakajima; Atsushi Kanno; Naokatsu Yamamoto (IEICE Trans. Electron., 2022)

Transparent Relay and Switching of THz-wave Signals in 285-GHz Band Using Photonic Technology. - Pham Tien Dat; Yuya Yamaguchi; Keizo Inagaki; Shingo Takano; Shotaro Hirata; Junichiro Ichikawa; Ryo Shimizu; Isao Morohashi; Yuki Yoshida; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi; et al. (OFC, 2023)

Transparent Radio-Fiber-Radio-Fiber System in 100-GHz Band for Indoor Uplink Signal Transmission in Beyond 5G. - Pham Tien Dat; Yuya Yamaguchi; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi; Kouichi Akahane (OFC, 2023)

100-Gbps 2-SDM 2-WDM FSO beam direct detection using resonant cavity 4x4 photodetector array. - Toshimasa Umezawa; Atsushi Matsumoto; Kouichi Akahane; Atsushi Kanno; Naokatsu Yamamoto (OFC, 2023)

Gbps-Class Solar-Blind WDM Optical Wireless Communication By (264, 274, 282)-nm Deep-UV LEDs and CsTe Photomultiplier Tube. - Yuki Yoshida; Kazunobu Kojima; Masaki Shiraiwa; Atsushi Kanno; Akira Hirano; Yosuke Nagasawa; Masamichi Ippommatsu; Naokatsu Yamamoto; Shigefusa Chichibu; Yoshinari Awaji (OFC, 2023)

151.5-GHz Sub-THz Signal Reception and Downconversion Using All-Optical Technology. - Pham Tien Dat; Yuya Yamaguchi; Shingo Takano; Shotaro Hirata; Junichiro Ichikawa; Ryo Shimizu; Keizo Inagaki; Isao Morohashi; Yuki Yoshida; Atsushi Kanno; Naokatsu Yamamoto; Kouichi Akahane (OFC, 2024)

Low Threshold and 10kHz-Class Narrow Linewidth 1.55 µm-Band Quantum Dot Laser Diode on InP(311)B Substrate. - Atsushi Matsumoto; Ryota Yabuki; Shinya Nakajima; Toshimasa Umezawa; Siim Heinsalu; Yuichi Matsushima; Koichi Akahane; Naokatsu Yamamoto; Katsuyuki Utaka (OFC, 2024)

DC-226 GHz well-impedance-matched high-speed photoreceiver for multi-band signal detection. - Toshimasa Umezawa; Pham Tien Dat; Yuki Yoshida; Shinya Nakajima; Atsushi Matsumoto; Kouichi Akahane; Atsushi Kanno; Naokatsu Yamamoto (OFC, 2024)

Demonstration of Robust Mobile Free Space Optical System using High-speed Beam Tracking and 2D-PDA-based Spatial-Diversity Reception. - Zu-Kai Weng; Yuki Yoshida; Toshimasa Umezawa; Abdelmoula Bekkali; Michikazu Hattori; Atsushi Matsumoto; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi; Kouichi Akahane (OFC, 2024)

40-Gbit/s Mobile FSO with High-speed Beam Stabilizer and 2D-PDA-based Diversity Receiver for Support Robots. - Zu-Kai Weng; Yuki Yoshida; Toshimasa Umezawa; Abdelmoula Bekkali; Michikazu Hattori; Atsushi Matsumoto; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi; Kouichi Akahane (OFC, 2024)

Thin-Film Lithium Niobate Modulator for a Flat Frequency-Response over 110 GHz Bandwidth with Integrated Electro-Optic Frequency-Domain Equalizer. - Yuya Yamaguchi; Pham Tien Dat; Naokatsu Yamamoto; Kouichi Akahane; Atsushi Kanno; Tetsuya Kawanishi (OFC, 2024)

Sub-Terahertz Signal Demultiplexing and Downconversion Using Photonic Technology. - Pham Tien Dat; Yuya Yamaguchi; Yuki Yoshida; Atsushi Kanno; Naokatsu Yamamoto; Tetsuya Kawanishi; Kouichi Akahane (OFC, 2025)

Fully Packaged 100-GHz-Bandwidth EO-Equalizer-Integrated TFLN Modulator with Record-High Slope Efficiency Enabling 200-GBaud Signaling. - Yuya Yamaguchi; Paikun Zhu; Pham Tien Dat; Shingo Takano; Shotaro Hirata; Yu Kataoka; Junichiro Ichikawa; Ryo Shimizu; Kouichi Akahane; Naokatsu Yamamoto; Atsushi Kanno; Tetsuya Kawanishi (OFC, 2025)

Low-Complexity Digital Twinning of Optical I/Q Modulator by Direct-Detection with Widely Non-Linear Phase Retrieval. - Yuki Yoshida; Shoichiro Oda; Naokatsu Yamamoto; Takeshi Hoshida; Kouichi Akahane (OFC, 2025)

Fiber Nonlinearity Compensation Using Nonlinear Equalizer Based on Complex-Valued Reservoir Computing. - Kai Ikuta; Yuta Ito; Takahide Sakamoto; Naokatsu Yamamoto; Moriya Nakamura (IEICE Trans. Commun., 2025)