Ryo Koma

According to our database, Ryo Koma authored at least 14 papers between 2014 and 2023.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of five.

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, Kazutaka Hara, Jun-ichi Kani, Tadao Nagatsuma

IEICE Trans. Electron., November, 2023

2022

First Demonstration of 128-Gbit/s 300-GHz-band THz Transmission Using OFC-based Transmitter and Intradyne Receiver.

Ryo Igarashi, Keita Toichi, Tsubasa Saijo, Ryo Koma, Kazutaka Hara, Jun-ichi Kani, Tomoaki Yoshida, Tadao Nagatsuma

Proceedings of the 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC), 2022

2021

Simultaneous Reception of ASK-based AMCC Signals and QPSK Signals with Single Coherent Receiver.

Ryo Igarashi, Ryo Koma, Kazutaka Hara, Kazuaki Honda, Junichi Kani, Tomoaki Yoshida

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2021

Novel EA-DFB Mode-Switching Transmitter Supporting Continuous Phase Frequency Shift Keying and Intensity Modulation for All-Photonics Network.

Ryo Koma, Kazutaka Hara, Takuya Kanai, Junichi Kani, Tomoaki Yoshida

Proceedings of the European Conference on Optical Communication, 2021

2018

Burst-Mode Digital Signal Processing That Pre-Calculates FIR Filter Coefficients for Digital Coherent PON Upstream.

Ryo Koma, Masamichi Fujiwara, Jun-ichi Kani, Ken-Ichi Suzuki, Akihiro Otaka

JOCN, 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, Takuya Kanai, Junichi Kani, Akihiro Otaka

Proceedings of the Optical Fiber Communications Conference and Exposition, 2018

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, Noriko Iiyama, Junichi Kani, Akihiro Otaka

Proceedings of the European Conference on Optical Communication, 2018

2017

Increasing Splitting Ratio of Extended-Reach WDM/TDM-PON by Using Central Office Sited Automatic Gain Controlled SOAs.

Masamichi Fujiwara, Ryo Koma

IEICE Trans. Commun., 2017

Performance evaluation of CPFSK transmitters for TDM-based digital coherent PON upstream.

Masamichi Fujiwara, Ryo Koma, Junichi Kani, Ken-Ichi Suzuki, Akihiro Otaka

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2017

High Sensitivity and Wide Dynamic Range Burst-Mode Coherent Receiver that Controls Gains of a SOA and TIAs for Long-Reach and High-Splitting-Ratio PON.

Ryo Koma, Masamichi Fujiwara, Junichi Kani, Ken-Ichi Suzuki, Akihiro Otaka

Proceedings of the European Conference on Optical Communication, 2017

2016

Wide dynamic range burst-mode digital coherent detection using fast ALC-EDFA and pre-calculation of FIR filter coefficients.

Ryo Koma, Masamichi Fujiwara, Junichi Kani, Ken-Ichi Suzuki, Akihiro Otaka

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2016

2015

High-splitting-ratio WDM/TDM-PONs using automatic gain controlled SOAs designed for central office use.

Masamichi Fujiwara, Ryo Koma, Katsuhisa Taguchi

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2015

Compact bi-directional EDFAs to support extended power budget class of TWDM-PON.

Masamichi Fujiwara, Ryo Koma, Ken-Ichi Suzuki, Akihiro Otaka

Proceedings of the European Conference on Optical Communication, 2015

2014

Wide dynamic range burst-mode reception of symmetrically clipped DCO-OFDM using optical domain power equalizer.

Ryo Koma, Masamichi Fujiwara, Shunji Kimura, Naoto Yoshimoto, Hideaki Kimura

Proceedings of the European Conference on Optical Communication, 2014