Kouji Nakahara

14 papers Journal 5Unranked 9
YearRankTypeTitle / Venue / Authors
2024 — conf
CW-WDM MSA compatible 100-mW (up to 50°C), 400-GHz spacing highly-reliable CW-DFB 8-channel laser array.
OFC
Ryosuke Hatai, Kouji Nakahara, Atsushi Nakamura, Takayuki Nakajima, Yoshihiko Kobayashi, Takeo Kageyama, Shigehisa Tanaka
2022 — conf
Over 100 mW Uncooled Operation of SOA-integrated 1.3-µm Highly Reliable CW-DFB Laser.
OFC
Shoko Yokokawa, Atsushi Nakamura, Shigetaka Hamada, Ryosuke Nakajima, Kaoru Okamoto, Masatoshi Arasawa, Kouji Nakahara, Shigehisa Tanaka
2021 — conf
112-Gb/s PAM-4 Uncooled Directly Modulated BH Lasers.
ECOC
Kouji Nakahara, Kazuki Suga, Kaoru Okamoto, Shigenori Hayakawa, Masatoshi Arasawa, Tetsuya Nishida, Ryu Washino, Takeshi Kitatani, Masatoshi Mitaki, Hironori Sakamoto, Yasushi Sakuma, Shigehisa Tanaka
2020 — conf
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.
OFC
Kazuki Suga, Kouji Nakahara, Kaoru Okamoto, Shigenori Hayakawa, Masatoshi Arasawa, Tetsuya Nishida, Ryu Washino, Takeshi Kitatani, Masatoshi Mitaki, Hironori Sakamoto, Yasushi Sakuma, Shigehisa Tanaka
2018 — conf
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.
OFC
Kouji Nakahara, Riu Hirai, Takeshi Kitatani, Nobuhiko Kikuchi, Takayoshi Fukui, Kaoru Okamoto, Yasushi Sakuma, Kohichi Robert Tamura, 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
2014 — conf
56-Gb/s direct modulation in InGaAlAs BH-DFB lasers at 55°C.
OFC
Kouji Nakahara, Yuki Wakayama, Takeshi Kitatani, Takafumi Taniguchi, Toshihiko Fukamachi, Yasushi Sakuma, Shigehisa Tanaka
2013 — conf
28-Gb/s directly modulated InGaAlAs ACPM DFB lasers with high mask margin of 22% at 55°C.
OFC/NFOEC
Kouji Nakahara, Yuki Wakayama, K. Hiruma, Takeshi Kitatani, Kazunori Shinoda, T. Fukamachi, Yasushi Sakuma, Shigehisa Tanaka
2006 J jnl
100-Gb/s Physical-Layer Architecture for Next-Generation Ethernet.
IEICE Trans. Commun.
Hidehiro Toyoda, Shinji Nishimura, Michitaka Okuno, Kouji Fukuda, Kouji Nakahara, Hiroaki Nishi
2005 J jnl
High-Temperature and High-Speed Performances of InGaAlAs-MQW DFB Lasers for 10-Gb/s Datacom Applications.
IEICE Trans. Electron.
Kouji Nakahara
1991 J jnl
An all DC-powered Josephson logic circuit.
IEEE J. Solid State Circuits
Yuji Hatano, Hideyuki Nagaishi, Shinichiro Yano, Kouji Nakahara, Hiroji Yamada, Shinya Kominami, Mikio Hirano