Wide-Range Frequency Offset Compensation for CPFSK Used as TOM-Based Digital Coherent PON's Upstream Signals. - Takuya Kanai; Masamichi Fujiwara; Ryo Koma; Ryo Igarashi 001; Noriko Iiyama; Junichi Kani; Akihiro Otaka (ECOC, 2018)

Wide Range Carrier Frequency Offset Estimation Method using Training Symbols with Asymmetric Constellations for Burst-Mode Coherent Reception. - Ryo Koma; Masamichi Fujiwara; Ryo Igarashi 001; Takuya Kanai; Junichi Kani; Akihiro Otaka (OFC, 2018)

Raman Amplification Based 40 km Reach 10G-EPON for Consolidation on the Central Office Building. - Ryo Igarashi 001; Masamichi Fujiwara; Takuya Kanai; Junichi Kani; Jun Terada (OECC/PSC, 2019)

Bus-Type Optical Access using DRA and Asymmetric Power Splitters for Accommodating Rural Users. - Ryo Igarashi 001; Masamichi Fujiwara; Takuya Kanai; Kazutaka Hara; Atsuko Kawakita; Hiro Suzuki; Junichi Kani; Jun Terada (OFC, 2020)

Reach Extension of 10G-EPON Upstream Transmission Using Distributed Raman Amplification and SOA. - Ryo Igarashi 001; Masamichi Fujiwara; Takuya Kanai; Hiro Suzuki; Junichi Kani; Jun Terada (IEICE Trans. Commun., 2020)

Simultaneous Reception of ASK-based AMCC Signals and QPSK Signals with Single Coherent Receiver. - Ryo Igarashi 001; Ryo Koma; Kazutaka Hara; Kazuaki Honda; Junichi Kani; Tomoaki Yoshida (OFC, 2021)

First Demonstration of 128-Gbit/s 300-GHz-band THz Transmission Using OFC-based Transmitter and Intradyne Receiver. - Ryo Igarashi 001; Keita Toichi; Tsubasa Saijo; Ryo Koma; Kazutaka Hara; Jun-ichi Kani; Tomoaki Yoshida; Tadao Nagatsuma (OECC/PSC, 2022)

New Photonic Gateway to Handle Digital-Coherent and IM-DD User Terminals and Enable Turn-back Connections in Metro/Access-Integrated All-Photonics Network. - Manabu Yoshino; Shin Kaneko; Naotaka Shibata; Ryo Igarashi 001; Jun-ichi Kani; Tomoaki Yoshida (OFC, 2023)

300-GHz-Band Diplexer for Frequency-Division Multiplexed Wireless Communication. - Yuma Kawamoto; Toki Yoshioka; Norihiko Shibata; Daniel Headland; Masayuki Fujita; Ryo Koma; Ryo Igarashi 001; Kazutaka Hara; Jun-ichi Kani; Tadao Nagatsuma (IEICE Trans. Electron., 2023)

Port-Agnostic Path Establishment with Point-to-Multipoint Control of Remote User Terminals for Metro/Access-Integrated All-Photonics Network. - Ryo Igarashi 001; Shin Kaneko; Yasutaka Kimura; Naotaka Shibata; Takahiro Suzuki; Masamichi Fujiwara; Jun-ichi Kani; Tomoaki Yoshida (OFC, 2024)

Photonic gateway architecture extension and guard time-free initial connection method with point-to-multipoint remote control for metro/access converged all-photonics network. - Shin Kaneko; Yasutaka Kimura; Ryo Igarashi 001; Naotaka Shibata; Takahiro Suzuki; Masamichi Fujiwara; Jun-ichi Kani; Tomoaki Yoshida (J. Opt. Commun. Netw., 2024)

Photonic Gateway accommodating all types of wavelength paths for digital-coherent and IM-DD user terminals in all-photonic metro-access converged networks. - Shin Kaneko; Manabu Yoshino; Naotaka Shibata; Ryo Igarashi 001; Jun-ichi Kani; Tomoaki Yoshida (J. Opt. Commun. Netw., 2024)