Koichiro Adachi

19 papers Journal 6Unranked 13
YearRankTypeTitle / Venue / Authors
2025 — conf
226 Gbps PAM4 Operation Using Differential Drive EA-DFB Laser with 2.0-Vppd Swing over 10-km SSMF Transmission for 1.6TbE Transceivers.
OFC
Shuhei Ohno, Takanori Suzuki, Hideaki Matsuzaki, Koichiro Adachi, Ryosuke Hatai, Ryo Nakao, Shinichi Tanaka, Atsushi Mimura, Takashi Suzuki, Noriko Sasada, Shigehisa Tanaka, Kazuhiko Naoe
2021 — conf
224-Gb/s PAM4 Uncooled Operation of Lumped-electrode EA-DFB Lasers with 2-km Transmission for 800GbE Application.
OFC
Syunya Yamauchi, Koichiro Adachi, Hideaki Asakura, Hayato Takita, Yoshihiro Nakai, Yoriyoshi Yamaguchi, Masatoshi Mitaki, Ryosuke Nakajima, Shigehisa Tanaka, Kazuhiko Naoe
2020 — conf
Direct Differential Drive of a Conventional 53-Gbaud EA-DFB using Commercially Available DSP.
ECOC
Koichiro Adachi, S. Tanaka
2020 — conf
Wide-temperature-range 100-Gbaud Operation of a Lumped-electrode-type EA-DFB for an 800-Gb/s Optical Transceiver.
ECOC
Koichiro Adachi, Syunya Yamauchi, Hideaki Asakura, Atsushi Nakamura, Kazuhiko Naoe, Shigehisa Tanak
2019 — conf
53-Gbaud PAM4 Differential Drive of a Conventional EA/DFB Toward Driver-Amplifier-Less Optical Transceivers.
OFC
Koichiro Adachi, Takayoshi Fukui, Masato Shishikura, Akira Nakanishi, Atsushi Nakamura, Takanori Suzuki, Shigehisa Tanaka
2018 J jnl
A Lens-Integrated Surface-Emitting DFB Laser and Its Application to Cost-Effective Single-Mode Optical Sub Assembly.
IEICE Trans. Electron.
Koichiro Adachi, Takanori Suzuki, Shigehisa Tanaka
2017 — conf
A passive optical alignment technique for single-mode fibers and light-source arrays.
OFC
Koichiro Adachi, Akira Nakanishi, Takanori Suzuki, Hiroki Irie, Yusuke Sasaki, T. Aoki, Masato Shishikura, Kazuhiko Naoe, Shigehisa Tanaka
2017 — conf
Experimental Study of Adjustable Single-Mode Optical-Coupling Using Movable Micro-Mirror Array.
ECOC
Takanori Suzuki, Koichiro Adachi, Shigehisa Tanaka
2016 J jnl
A facet-free 1.3-µm surface-emitting DFB laser for a low-cost optical module.
IEICE Electron. Express
Koichiro Adachi, Takanori Suzuki, Kouji Nakahara, Shigehisa Tanaka, Akira Nakanishi, Kazuhiko Naoe
2016 J jnl
Monolithically integrated 4 ch × 25.8 Gbps lens-integrated surface-emitting DFB laser array directly coupled to SMF.
IEICE Electron. Express
Koichiro Adachi, Takanori Suzuki, Aki Takei, Kouji Nakahara, Shigehisa Tanaka, Akira Nakanishi, Kazuhiko Naoe
2015 — conf
A 50-Gb/s NRZ-modulated optical transmitter based on a DFB-LD and a 0.18-µm SiGe BiCMOS LD driver.
OFC
Takashi Takemoto, Yasunobu Matsuoka, Yoshikazu Sugiyama, Hidenori Yonezawa, Hiroki Yamashita, Koichiro Adachi, Takahiro Nakamura, Etsuko Nomoto, Kouji Nakahara, Hideo Arimoto, Kenichi Osada, Tatemi Ido
2015 — conf
Capability of high optical-feedback tolerance and non-hermetic-packaging for low-cost interconnections using lens-integrated surface-emitting laser.
OFC
Takanori Suzuki, Koichiro Adachi, Aki Takei, Yuki Wakayama, Akira Nakanishi, Kazuhiko Naoe, Kouji Nakahara, Shigehisa Tanaka, Kazuhisa Uomi
2015 — conf
Facet-free surface-emitting 1.3-μm DFB laser.
ECOC
Koichiro Adachi, Takanori Suzuki, T. Ohtoshi, K. Nakahara, M. Sagawa, Akira Nakanishi, Kazuhiko Naoe, Shigehisa Tanak
2015 — conf
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.
OFC
Koichiro Adachi, Yasunobu Matsuoka, Takashi Takemoto, Takanori Suzuki, Shigehisa Tanaka, Akira Nakanishi, Kazuhiko Naoe
2014 — conf
High-efficiency optical coupling to SMF array and high-temperature 25-Gb/s operation of lens-integrated surface-emitting laser toward PSM4 optical module.
ECOC
Koichiro Adachi, Aki Takei, Takanori Suzuki, Shigehisa Tanak, Akira Nakanishi, Kazuhiko Naoe
2013 J jnl
25 Gb/s 150-m Multi-Mode Fiber Transmission Using a CMOS-Driven 1.3-µm Lens-Integrated Surface-Emitting Laser.
IEICE Trans. Electron.
Daichi Kawamura, Toshiaki Takai, Yong Lee, Kenji Kogo, Koichiro Adachi, Yasunobu Matsuoka, Norio Chujo, Reiko Mita, Saori Hamamura, Satoshi Kaneko, Kinya Yamazaki, Yoshiaki Ishigami, Toshiki Sugawara, Shinji Tsuji
2013 — conf
Compact and power-efficient 100-Gbps CMOS-based transceiver.
OFC/NFOEC
Takashi Takemoto, Hiroki Yamashita, Fumio Yuki, Shinji Tsuji, Yong Lee, Koichiro Adachi, Kazunori Shinoda, Yasunobu Matsuoka, Toshiki Sugawara, Shinji Nishimura, Norio Chujo, Masaaki Nido, Kazuhiko Kurata, Junji Baba, Yoshinori Watanabe, Naoya Ikeda
2011 J jnl
A 25 Gb/s 65-nm CMOS Low-Power Laser Diode Driver With Mutually Coupled Peaking Inductors for Optical Interconnects.
IEEE Trans. Circuits Syst. I Regul. Pap.
Norio Chujo, Toshiaki Takai, Toshiki Sugawara, Yasunobu Matsuoka, Daichi Kawamura, Koichiro Adachi, Tsuneo Kawamata, Tsuneo Ohno, Kenichi Ohhata
2011 J jnl
A 35-GHz, 0.8-A/W and 26-µm Misalignment Tolerance Microlens-Integrated p-i-n Photodiodes.
IEICE Trans. Electron.
Yong Lee, Kazuyuki Nagatsuma, Kazuhiko Hosomi, Takuma Ban, Kazunori Shinoda, Koichiro Adachi, Shinji Tsuji, Yasunobu Matsuoka, Shigehisa Tanaka, Reiko Mita, Toshiki Sugawara, Masahiro Aoki