LGLC tunable laser with highly stable SMSR against large filter deviation for full C-band operation. - Atsushi Nakamura; Kazuhiko Naoe; M. Sakai; Shigenori Hayakawa; K. Motoda; Kazuhisa Uomi; Takanori Suzuki; Hideo Arimoto; Shigehisa Tanak (OFC/NFOEC, 2013)

Uncooled clear-eye-opening operation (25 to 95°C) of 25.8/28-Gbps 1.3-µm InGaAlAs-MQW directly modulated DFB lasers. - T. Fukamachi; Atsushi Nakamura; Yasushi Sakuma; Shigenori Hayakawa; Ryu Washino; M. Mukaikubo; K. Okamoto; T. Nakajima; K. Motoda; Kazuhiko Naoe; K. Nakahara; Yuki Wakayama; et al. (OFC, 2014)

25.8 Gbps error free transmission over 10 km at wavelengths from 1271 to 1331nm by uncooled (25 to 85°C) directly modulated DFB lasers for 100G-CWDM4. - Takayuki Nakajima; T. Fukamachi; Mitsuo Akashi; Atsushi Nakamura; Yasushi Sakuma; Shigenori Hayakawa; Ryu Washino; M. Mukaikubo; K. Okamoto; K. Motoda; Kazuhiko Naoe; K. Nakahara; et al. (OFC, 2015)

Uncooled Operation of 53-Gbaud PAM4 (106-Gb/s) EA/DFB Lasers with Extremely Low Drive Voltage with 0.9 Vpp. - Yoshihiro Nakai; Akira Nakanishi; Yoriyoshi Yamaguchi; Syunya Yamauchi; Atsushi Nakamura; Hideaki Asakura; Hayato Takita; Shigenori Hayakawa; Masatoshi Mitaki; Yasushi Sakuma; Kazuhiro Naoe (ECOC, 2018)

Wide-Temperature-Range (25°C to 80°C) 53-Gbaud PAM4 (106-Gb/s) Operation of 1.3-µm Directly Modulated DFB Lasers for 10-km Transmission. - Noriko Sasada; Takayuki Nakajima; Yuji Sekino; Akira Nakanishi; M. Mukaikubo; M. Ebisu; Masatoshi Mitaki; Shigenori Hayakawa; Kazuhiko Naoe (ECOC, 2018)

Uncooled Operation of 53-Gbaud PAM4 EA-DFB Lasers in the Wavelength Range of 1510-1570 nm for 800-GbE Applications. - Yoshihiro Nakai; Shigenori Hayakawa; Syunya Yamauchi; Yoriyoshi Yamaguchi; Tetsuyoshi Takamure; Hideaki Asakura; Ryosuke Nakajima; Shigetaka Hamada; Kazuhiko Naoe (OFC, 2020)

Analysis of TDECQ Dependence on Skew and Extinction Ratio with 106-Gb/s PAM-4 Modulation of Directly Modulated Submicron Ridge Localized Buried Heterostructure Lasers. - Kazuki Suga; Kouji Nakahara; Kaoru Okamoto; Shigenori Hayakawa; Masatoshi Arasawa; Tetsuya Nishida; Ryu Washino; Takeshi Kitatani; Masatoshi Mitaki; Hironori Sakamoto; Yasushi Sakuma; Shigehisa Tanaka (OFC, 2020)

112-Gb/s PAM-4 Uncooled Directly Modulated BH Lasers. - Kouji Nakahara; Kazuki Suga; Kaoru Okamoto; Shigenori Hayakawa; Masatoshi Arasawa; Tetsuya Nishida; Ryu Washino; Takeshi Kitatani; Masatoshi Mitaki; Hironori Sakamoto; Yasushi Sakuma; Shigehisa Tanaka (ECOC, 2021)

106-Gb/s PAM4 Operation of Directly Modulated DFB Lasers from 25 to 70°C for Transmission over 2-km SMF in the CWDM range. - Takayuki Nakajima; Masaru Onga; Yuji Sekino; Akira Nakanishi; Noriko Sasada; Shigenori Hayakawa; Shigetaka Hamada; Kazuhiko Naoe (OFC, 2021)