T
Takuro Fujii
Researcher at Nippon Telegraph and Telephone
Publications - 167
Citations - 1590
Takuro Fujii is an academic researcher from Nippon Telegraph and Telephone. The author has contributed to research in topics: Laser & Photonic crystal. The author has an hindex of 15, co-authored 141 publications receiving 1134 citations. Previous affiliations of Takuro Fujii include Keio University.
Papers
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Proceedings ArticleDOI
Membrane III-V/Si DFB laser with width modulated silicon waveguide for narrowing linewDTH
Takuma Aihara,Tatsurou Hiraki,Takuro Fujii,Koji Takeda,Tai Tsuchizawa,Takaaki Kakitsuka,Shinji Matsuo +6 more
Proceedings ArticleDOI
25-Gbit/s direct modulation of photonic-crystal lasers with a 10.5-fJ/bit energy cost for on/off-chip optical interconnects
Koji Takeda,Tomonari Sato,Takuro Fujii,Akihiko Shinya,Eiichi Kuramochi,Masaya Notomi,Koichi Hasebe,Takaaki Kakitsuka,Shinji Matsuo +8 more
TL;DR: In this paper, the authors evaluated high-speed behavior of electrically driven photonic crystal lasers by direct modulations and found that they had 17.8 GHz 3dB bandwidth and a 25 Gbit/s eye diagram was also demonstrated with a bias current as low as 150 μA.
Proceedings ArticleDOI
Heterogeneously Integrated Low-Power-Consumption Semiconductor Optical Amplifier on Si Platform
Tatsurou Hiraki,Takuma Aihara,Koji Takeda,Takuro Fujii,Tai Tsuchizawa,Takaaki Kakitsuka,Shinji Matsuo +6 more
TL;DR: A membrane semiconductor optical amplifier heterogeneously integrated with SiN waveguides on SiO 2 /Si substrate exhibits 10dB on-chip gain with 13-mA bias current as mentioned in this paper.
Proceedings ArticleDOI
Single-mode lasing of Lambda-scale Embedded Active-region Photonic-crystal (LEAP) laser with in-line coupled waveguide
Akihiko Shinya,T. Sato,Koji Takeda,Kengo Nozaki,E. Kuramochi,Takaaki Kakitsuka,Hideaki Taniyama,Takuro Fujii,Matsuo Shinji,Masaya Notomi +9 more
TL;DR: In this paper, a new design for buried heterostructure photonic crystal nanocavity lasers with in-line coupled output waveguides and coupling buffer regions is proposed to realize single-mode lasing and a high output power for a current-injected nanolaser.
Proceedings ArticleDOI
High Performance Epitaxially Grown III-V Membrane Lasers on Si
TL;DR: A new epitaxial growth technique for use with a directly bonded InP-based membrane on SiO/Si enables us to fabricate high performance buried heterostructure lasers.