フェロー／上席特別研究員／特別研究員

将来のFiber-To-The-Home(FTTH)サービスや、IOWNを支えるAll-Photonics Networksに向け、光アクセスネットワークの要件に合致した高速光伝送技術の研究開発により、超高速通信サービスを全ての光アクセスユーザに経済的に提供することを目指します。

2023年国際会議OECC（Opto-Electronics and Communications Conference）2023 Best Industrial Paper Award受賞
2018年電子情報通信学会通信方式研究会委員長章

光通信国際会議 OFC （Optical Fiber Communication Conference） Subcommittee (N4: Optical Access Networks for Fixed and Mobile Services) 技術プログラム委員　(2025年～)

R. Koma, K. Hara, J. -I. Kani and T. Yoshida, "Burst-Mode Multi-Level-CPFSK Signal Detection Using DD-LMS Based Adaptive Equalizer for High-Speed TDM-PON Upstream," in Journal of Lightwave Technology, vol. 42, no. 10, pp. 3736-3746, 15 May15, 2024, doi: 10.1109/JLT.2024.3368269.
R. Koma, M. Fujiwara, R. Igarashi, K. Hara, J. -i. Kani and T. Yoshida, "Novel Data-Aided Carrier Frequency Offset Compensation Methods using Asymmetric-Shape Constellations for Burst-Mode Coherent Reception," in Journal of Lightwave Technology, 2022, doi: 10.1109/JLT.2022.3215193.
R. Koma, M. Fujiwara, J. -i. Kani and T. Yoshida, "Fast Feed-Forward Optical and Electrical Gain Control to Extend the Dynamic Range of the Burst-Mode Digital Coherent Receiver for High-Speed TDM-PON Systems," in Journal of Lightwave Technology, vol. 40, no. 3, pp. 647-654, 1 Feb.1, 2022, doi: 10.1109/JLT.2021.3120805.
R. Koma, M. Fujiwara, J. i. Kani, K. I.Suzuki, and A. Otaka, "Burst-ModeDigital Signal Processing That Pre-Calculates FIR Filter Coefficients for DigitalCoherent PON Upstream," IEEE / OSA J. Opt. Commun. Netw., vol. 10, no.5 ,pp. 461-470 ,2018.
R. Koma, M. Fujiwara, J. i. Kani, S.Y. Kim, T. Suzuki, K. I. Suzuki, and A. Otaka, "Demonstration of Real-Time Burst-Mode Digital Coherent Reception With Wide Dynamic Range in DSP-Based PON Upstream (Invited)," IEEE/OSA J. Lightw. Technol., vol. 35, no. 8, pp. 1392-1398, 2017.

胡間 遼