Flat-Topped Spectral Response in a Ladder-Type Interferometric Filter. - Seok-Hwan Jeong; Shinji Matsuo; Yuzo Yoshikuni; Toru Segawa; Yoshitaka Ohiso; Hiroyuki Suzuki (IEICE Trans. Electron., 2005)

A High-Speed Tunable Optical Filter Using a Semiconductor Ring Resonator for Photonic Packet Switch. - Shinji Matsuo; Yoshitaka Ohiso; Toru Segawa (IEICE Trans. Electron., 2005)

2-µm wavelength tunable distributed Bragg reflector laser. - Takuya Kanai; Naoki Fujiwara; Yoshitaka Ohiso; Hiroyuki Ishii; Makoto Shimokozono; Mikitaka Itoh (IEICE Electron. Express, 2016)

28-Gbit/s 80-km transmission using SOA-assisted extended-reach EADFB laser (AXEL). - Koichi Hasebe; Wataru Kobayashi; Naoki Fujiwara; Takahiko Shindo; Toshihide Yoshimatsu; Shigeru Kanazawa; Tetsuichiro Ohno; Hiroaki Sanjoh; Yoshitaka Ohiso; Hiroyuki Ishii; Yoshiaki Sone; Hideaki Matsuzaki (OFC, 2017)

Advantages of SOA Assisted Extended Reach EADFB Laser (AXEL) for Operation at Low Power and with Extended Transmission Reach. - Wataru Kobayashi; Naoki Fujiwara; Takahiko Shindo; Yoshitaka Ohiso; Shigeru Kanazawa; Hiroyuki Ishii; Koichi Hasebe; Hideaki Matsuzaki; Mikitaka Itoh (IEICE Trans. Electron., 2017)

Characteristics of GaInAsP/SOI Hybrid Semiconductor Optical Amplifier with InP-based Two-storied Ridge Structure. - Yutaka Makihara; Nobuhiko Nishiyama; Takehiko Kikuchi; Takuo Hiratani; Naoki Fujiwara; Naoko Inoue; Toshiyuki Nitta; Moataz Eissa; Takuya Mitarai; Yuning Wang; Yoshitaka Ohiso; Tomohiro Amemiya; et al. (OECC/PSC, 2022)