Practical implementation of 100-Gbit/s/lambda optical short-reach transceiver with Nyquist PAM4 signaling using electroabsorptive modulated laser (EML). - Nobuhiko Kikuchi; Riu Hirai; Takayoshi Fukui (OFC, 2015)

Quasi single-sideband (SSB) IM/DD Nyquist PAM signaling for high-spectral efficiency DWDM transmission. - Nobuhiko Kikuchi; Riu Hirai; Takayoshi Fukui (OFC, 2016)

High-spectral efficiency DWDM transmission of 100-Gbit/s/lambda IM/DD single sideband-baseband-Nyquist-PAM8 signals. - Riu Hirai; Nobuhiko Kikuchi; Takayoshi Fukui (OFC, 2017)

Modulator Non-Linearity Compensation in Tomlinson-Harashima Precoding (THP) for Short-Reach Nyquist- and Faster-than-Nyquist (FTN) IM/DD PAM Signaling. - Nobuhiko Kikuchi; Riu Hirai; Takayoshi Fukui; Shigehiro Takashima (ECOC, 2018)

Application of Tomlinson-Harashima Precoding (THP) for Short-Reach Band-Limited Nyquist PAM and Faster-Than-Nyquist PAM Signaling. - Nobuhiko Kikuchi; Riu Hirai; Takayoshi Fukui (OFC, 2018)

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. - Kouji Nakahara; Riu Hirai; Takeshi Kitatani; Nobuhiko Kikuchi; Takayoshi Fukui; Kaoru Okamoto; Yasushi Sakuma; Kohichi Robert Tamura; Shigehisa Tanaka (OFC, 2018)

53-Gbaud PAM4 Differential Drive of a Conventional EA/DFB Toward Driver-Amplifier-Less Optical Transceivers. - Koichiro Adachi; Takayoshi Fukui; Masato Shishikura; Akira Nakanishi; Atsushi Nakamura; Takanori Suzuki; Shigehisa Tanaka (OFC, 2019)

BER Improvement of IM/DD Higher-Order Optical PAM Signal with Precise Non-Linearity Compensation. - Nobuhiko Kikuchi; Riu Hirai; Takayoshi Fukui (OFC, 2019)