Compact and Low-Power-Consumption 40-Gbit/s, 1.55-µm Electro-Absorption Modulators. - Hideo Arimoto; Jun-ichiro Shimizu; Takeshi Kitatani; Kazunori Shinoda; Tomonobu Tsuchiya; Masataka Shirai; Masahiro Aoki; Noriko Sasada; Hiroshi Yamamoto; Kazuhiko Naoe; Mitsuo Akashi (IEICE Trans. Electron., 2005)

High-Speed EA-DFB Laser for 40-G and 100-Gbps. - Shigeki Makino; Kazunori Shinoda; Takeshi Kitatani; Hiroaki Hayashi; Takashi Shiota; Shigehisa Tanaka; Masahiro Aoki; Noriko Sasada; Kazuhiko Naoe (IEICE Trans. Electron., 2009)

Wide-Tuning-Wavelength-Range LGLC Laser with Low-Loss Dual-Core Spot Size Converter. - Takanori Suzuki; Hideo Arimoto; Takeshi Kitatani; Aki Takei; Takafumi Taniguchi; Kazunori Shinoda; Shigehisa Tanaka; Shinji Tsuji; Tatemi Ido; Jun Igrashi; Atsushi Nakamura; Kazuhiko Naoe; et al. (IEICE Trans. Electron., 2012)

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 (0 to 85°C) and full C-band operation of a 10.7 Gbit/s InP Mach-Zehnder modulator monolithically integrated with SOA. - Akira Nakanishi; Noriko Sasada; Yasushi Sakuma; Ryu Washino; K. Okamoto; Kazuhiko Naoe; Hiroaki Hayashi; Hideo Arimoto; Shigehisa Tanak (OFC/NFOEC, 2013)

High-efficiency optical coupling to SMF array and high-temperature 25-Gb/s operation of lens-integrated surface-emitting laser toward PSM4 optical module. - Koichiro Adachi; Aki Takei; Takanori Suzuki; Shigehisa Tanak; Akira Nakanishi; Kazuhiko Naoe (ECOC, 2014)

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)

Facet-free surface-emitting 1.3-μm DFB laser. - Koichiro Adachi; Takanori Suzuki; T. Ohtoshi; K. Nakahara; M. Sagawa; Akira Nakanishi; Kazuhiko Naoe; Shigehisa Tanak (ECOC, 2015)

Wide-temperature-range 103.2 (25.8 × 4)-Gb/s optical link for data-center Interconnects using a 1.3-µm lens-integrated surface-emitting laser array. - Koichiro Adachi; Yasunobu Matsuoka; Takashi Takemoto; Takanori Suzuki; Shigehisa Tanaka; Akira Nakanishi; Kazuhiko Naoe (OFC, 2015)

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)

Capability of high optical-feedback tolerance and non-hermetic-packaging for low-cost interconnections using lens-integrated surface-emitting laser. - Takanori Suzuki; Koichiro Adachi; Aki Takei; Yuki Wakayama; Akira Nakanishi; Kazuhiko Naoe; Kouji Nakahara; Shigehisa Tanaka; Kazuhisa Uomi (OFC, 2015)

A facet-free 1.3-µm surface-emitting DFB laser for a low-cost optical module. - Koichiro Adachi; Takanori Suzuki; Kouji Nakahara; Shigehisa Tanaka; Akira Nakanishi; Kazuhiko Naoe (IEICE Electron. Express, 2016)

Monolithically integrated 4 ch × 25.8 Gbps lens-integrated surface-emitting DFB laser array directly coupled to SMF. - Koichiro Adachi; Takanori Suzuki; Aki Takei; Kouji Nakahara; Shigehisa Tanaka; Akira Nakanishi; Kazuhiko Naoe (IEICE Electron. Express, 2016)

A passive optical alignment technique for single-mode fibers and light-source arrays. - Koichiro Adachi; Akira Nakanishi; Takanori Suzuki; Hiroki Irie; Yusuke Sasaki; T. Aoki; Masato Shishikura; Kazuhiko Naoe; Shigehisa Tanaka (OFC, 2017)

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)

Wide-temperature-range 100-Gbaud Operation of a Lumped-electrode-type EA-DFB for an 800-Gb/s Optical Transceiver. - Koichiro Adachi; Syunya Yamauchi; Hideaki Asakura; Atsushi Nakamura; Kazuhiko Naoe; Shigehisa Tanak (ECOC, 2020)

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)

Large-Optical-Aperture Top-Illuminated 50-Gbaud PIN-PD with High 3-dB Bandwidth at a Low Bias of 1.5 V. - Takashi Toyonaka; Hiroshi Hamada; Shigehisa Tanaka; Masatoshi Arasawa; Ryu Washino; Yasushi Sakuma; Kazuhiko Naoe (OFC, 2020)

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)

224-Gb/s PAM4 Uncooled Operation of Lumped-electrode EA-DFB Lasers with 2-km Transmission for 800GbE Application. - Syunya Yamauchi; Koichiro Adachi; Hideaki Asakura; Hayato Takita; Yoshihiro Nakai; Yoriyoshi Yamaguchi; Masatoshi Mitaki; Ryosuke Nakajima; Shigehisa Tanaka; Kazuhiko Naoe (OFC, 2021)

384-Gb/s/lane PAM8 Operation Using 76-GHz Bandwidth EA-DFB Laser at 50°C with 1.0-Vpp Swing over 2-km Transmission. - Hideaki Asakura; Kazuki Nishimura; Syunya Yamauchi; Koichiro Iwamoto; Yoshihiro Nakai; Yoriyoshi Yamaguchi; Kentaro Tani; Ryosuke Nakajima; Kazuhiko Naoe (OFC, 2022)

Ultrahigh Speed EA-DFB Lasers beyond 200 Gbps per Lane. - Kazuhiko Naoe (OFC, 2023)

225-Gb/s PAM4 Operation Using Lumped-Electrode-Type EA-DFB Laser for 5- and 10-km Transmission with Low TDECQ. - Kazuki Nishimura; Hideaki Asakura; Syunya Yamauchi; Takanori Suzuki; Yoshihiro Nakai; Yoriyoshi Yamaguchi; Takeo Kageyama; Masatoshi Mitaki; Yuma Endo; Kazuhiko Naoe (OFC, 2023)

10-km Transmission of 106-Gb/s PAM4 with Directly Modulated DFB Lasers in the CWDM Range. - Shuhei Ohno; Masaru Onga; Takayuki Nakajima; Akira Nakanishi; Noriko Sasada; Shinichi Tanaka; Ryosuke Nakajima; Kazuhiko Naoe (OFC, 2023)

226 Gbps PAM4 Operation Using Differential Drive EA-DFB Laser with 2.0-Vppd Swing over 10-km SSMF Transmission for 1.6TbE Transceivers. - Shuhei Ohno; Takanori Suzuki; Hideaki Matsuzaki; Koichiro Adachi; Ryosuke Hatai; Ryo Nakao; Shinichi Tanaka; Atsushi Mimura; Takashi Suzuki; Noriko Sasada; Shigehisa Tanaka; Kazuhiko Naoe (OFC, 2025)