Riu Hirai

Publication Activity (10 Years)

Years Active: 2014-2024
Publications (10 Years): 15

Top Topics

Unsupervised Learning

Amplitude Modulation

Moving Cast Shadows

Injection Lasers

Top Venues

IEICE Trans. Commun.

Publications

Nobuhiko Kikucih, Riu Hirai, Takahito Tanimura
Optical Single-Sideband (SSB) Conversion Technique Using Phase Modulator for High-Speed Short-Reach IM/DD PAM Signaling. OFC (2024)
Takahito Tanimura, Riu Hirai, Nobuhiko Kikuchi
Physical Status Representation in Multiple Administrative Optical Networks by Federated Unsupervised Learning. IEICE Trans. Commun. 106 (11) (2023)
Nobuhiko Kikuchi, Riu Hirai, Takahito Tanimura
Faster-Than-Nyquist IM/DD THP-PAM4 Signaling Using Directly-Modulated Laser with Laser Non-Linear Skew Compensation. OECC/PSC (2022)
Takahito Tanimura, Riu Hirai, Nobuhiko Kikuchi
Optical Status Representation by Collaborative and Unsupervised Learning. OECC/PSC (2022)
Nobuhiko Kikuchi, Riu Hirai
Application of Generalized THP for Arbitrary PAM Level Design in Short-Reach IM/DD Signalling. ECOC (2021)
Nobuhiko Kikuchi, Riu Hirai
Proposal of LUT-based transmitter nonlinearity compensator with precursor compensation for Short-Reach IM/DD PAM Signalling with Tomlinson-Harashima Precoding (THP). ECOC (2020)
Nobuhiko Kikuchi, Riu Hirai, Takayoshi Fukui
BER Improvement of IM/DD Higher-Order Optical PAM Signal with Precise Non-Linearity Compensation. OFC (2019)
Nobuhiko Kikuchi, Riu Hirai, Takayoshi Fukui
Application of Tomlinson-Harashima Precoding (THP) for Short-Reach Band-Limited Nyquist PAM and Faster-Than-Nyquist PAM Signaling. OFC (2018)
Kouji Nakahara, Riu Hirai, Takeshi Kitatani, Nobuhiko Kikuchi, Takayoshi Fukui, Kaoru Okamoto, Yasushi Sakuma, Kohichi Robert Tamura, Shigehisa Tanaka
Superior BER Transmission of 106-Gb/s/lane Skewless PAM4 over 10 km by Utilizing 1.3-μm Directly Modulated InGaAlAs-MQW BH Lasers and Incoherent Multiplexing of Two NRZ Signals. OFC (2018)
Nobuhiko Kikuchi, Riu Hirai, Takayoshi Fukui, Shigehiro Takashima
Modulator Non-Linearity Compensation in Tomlinson-Harashima Precoding (THP) for Short-Reach Nyquist- and Faster-than-Nyquist (FTN) IM/DD PAM Signaling. ECOC (2018)
Riu Hirai, Nobuhiko Kikuchi, Takayoshi Fukui
High-spectral efficiency DWDM transmission of 100-Gbit/s/lambda IM/DD single sideband-baseband-Nyquist-PAM8 signals. OFC (2017)
Nobuhiko Kikuchi, Riu Hirai, Takayoshi Fukui
Quasi single-sideband (SSB) IM/DD Nyquist PAM signaling for high-spectral efficiency DWDM transmission. OFC (2016)
Nobuhiko Kikuchi, Riu Hirai, Takayoshi Fukui
Practical implementation of 100-Gbit/s/lambda optical short-reach transceiver with Nyquist PAM4 signaling using electroabsorptive modulated laser (EML). OFC (2015)
Nobuhiko Kikuchi, Takashi Yano, Riu Hirai
FPGA prototyping of single-polarization 112-Gbit/s optical transceiver for optical multilevel signaling with delay detection. ECOC (2015)
Riu Hirai, Nobuhiko Kikuchi
Experimental demonstration of 100G/lambda Nyquist-PAM4 transmission with digital pre-equalization of chromatic dispersion for extended-reach 400GbE. OFC (2015)
Nobuhiko Kikuchi, Riu Hirai
Intensity-modulated / direct-detection (IM/DD) Nyquist pulse-amplitude modulation (PAM) signaling for 100-Gbit/s/λ optical short-reach transmission. ECOC (2014)
Nobuhiko Kikuchi, Riu Hirai, Yuki Wakayama
High-speed optical 64QAM signal generation using InP-based semiconductor IQ modulator. OFC (2014)