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Journal Articles
- 2023
[j3]Yuma Kawamoto, Toki Yoshioka, Norihiko Shibata, Daniel Headland, Masayuki Fujita, Ryo Koma, Ryo Igarashi, Kazutaka Hara, Jun-ichi Kani, Tadao Nagatsuma
:
300-GHz-Band Diplexer for Frequency-Division Multiplexed Wireless Communication. IEICE Trans. Electron. 106(11): 722-726 (2023)- 2018
- [j2]Ryo Koma, Masamichi Fujiwara, Jun-ichi Kani, Ken-Ichi Suzuki, Akihiro Otaka:
Burst-Mode Digital Signal Processing That Pre-Calculates FIR Filter Coefficients for Digital Coherent PON Upstream. JOCN 10(5): 461-470 (2018) - 2017
- [j1]Masamichi Fujiwara, Ryo Koma:
Increasing Splitting Ratio of Extended-Reach WDM/TDM-PON by Using Central Office Sited Automatic Gain Controlled SOAs. IEICE Trans. Commun. 100-B(8): 1388-1396 (2017)
Conference and Workshop Papers
- 2022
- [c11]Ryo Igarashi, Keita Toichi, Tsubasa Saijo, Ryo Koma, Kazutaka Hara, Jun-ichi Kani, Tomoaki Yoshida, Tadao Nagatsuma:
First Demonstration of 128-Gbit/s 300-GHz-band THz Transmission Using OFC-based Transmitter and Intradyne Receiver. OECC/PSC 2022: 1-3 - 2021
- [c10]Ryo Koma, Kazutaka Hara, Takuya Kanai, Junichi Kani, Tomoaki Yoshida:
Novel EA-DFB Mode-Switching Transmitter Supporting Continuous Phase Frequency Shift Keying and Intensity Modulation for All-Photonics Network. ECOC 2021: 1-4 - [c9]Ryo Igarashi, Ryo Koma, Kazutaka Hara, Kazuaki Honda, Junichi Kani, Tomoaki Yoshida:
Simultaneous Reception of ASK-based AMCC Signals and QPSK Signals with Single Coherent Receiver. OFC 2021: 1-3 - 2018
- [c8]Takuya Kanai, Masamichi Fujiwara, Ryo Koma, Ryo Igarashi, Noriko Iiyama, Junichi Kani, Akihiro Otaka:
Wide-Range Frequency Offset Compensation for CPFSK Used as TOM-Based Digital Coherent PON's Upstream Signals. ECOC 2018: 1-3 - [c7]Ryo Koma, Masamichi Fujiwara, Ryo Igarashi, Takuya Kanai, Junichi Kani, Akihiro Otaka:
Wide Range Carrier Frequency Offset Estimation Method using Training Symbols with Asymmetric Constellations for Burst-Mode Coherent Reception. OFC 2018: 1-3 - 2017
- [c6]Ryo Koma, Masamichi Fujiwara, Junichi Kani, Ken-Ichi Suzuki, Akihiro Otaka:
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. ECOC 2017: 1-3 - [c5]Masamichi Fujiwara, Ryo Koma, Junichi Kani, Ken-Ichi Suzuki, Akihiro Otaka:
Performance evaluation of CPFSK transmitters for TDM-based digital coherent PON upstream. OFC 2017: 1-3 - 2016
- [c4]Ryo Koma, Masamichi Fujiwara, Junichi Kani, Ken-Ichi Suzuki, Akihiro Otaka:
Wide dynamic range burst-mode digital coherent detection using fast ALC-EDFA and pre-calculation of FIR filter coefficients. OFC 2016: 1-3 - 2015
- [c3]Masamichi Fujiwara, Ryo Koma, Ken-Ichi Suzuki, Akihiro Otaka:
Compact bi-directional EDFAs to support extended power budget class of TWDM-PON. ECOC 2015: 1-3 - [c2]Masamichi Fujiwara, Ryo Koma, Katsuhisa Taguchi:
High-splitting-ratio WDM/TDM-PONs using automatic gain controlled SOAs designed for central office use. OFC 2015: 1-3 - 2014
- [c1]Ryo Koma, Masamichi Fujiwara, Shunji Kimura, Naoto Yoshimoto, Hideaki Kimura:
Wide dynamic range burst-mode reception of symmetrically clipped DCO-OFDM using optical domain power equalizer. ECOC 2014: 1-3
Coauthor Index
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