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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Journal ArticleDOI
50-GHz-Bandwidth Membrane InGaAsP Electro-Absorption Modulator on Si Platform
Tatsurou Hiraki,Takuma Aihara,Yoshiho Maeda,Takuro Fujii,Tai Tsuchizawa,Kiyoto Takahata,Takaaki Kakitsuka,Shinji Matsuo +7 more
TL;DR: In this paper, a membrane InP-based electro-absorption modulator (EAM) was fabricated by combining direct bonding of the MQW layer and regrowth of the InP layer on a thin InP template bonded on a silicon-on-insulator wafer.
Journal ArticleDOI
Integration of a high-efficiency Mach-Zehnder modulator with a DFB laser using membrane InP-based devices on a Si photonics platform
Tatsurou Hiraki,Takuma Aihara,Takuro Fujii,Koji Takeda,Yoshiho Maeda,Takaaki Kakitsuka,Tai Tsuchizawa,Shinji Matsuo +7 more
TL;DR: In this paper, the authors demonstrate a wafer-level integration of a distributed feedback laser diode (DFB LD) and high-efficiency Mach-Zehnder modulator (MZM) using InGaAsP phase shifters on Si waveguide circuits.
Patent
Semiconductor optical device
TL;DR: In this paper, a semiconductor optical device is configured as to form an active layer and an embedded waveguide structure on the semiconductor board, subjecting embedded layers at both sides of the active layer to impurity doping, and laterally inject a current into the active surface, where p-type doping layers are provided on upper and lower sides of active layer.
Journal ArticleDOI
F/sub 2/ laser deposition of CdTe microcrystallites-doped fluoropolymer thin films
TL;DR: In this article, CdTe microcrystallites were synthesized in the PTFE thin-film process and the X-ray photoemission spectra showed an absorption edge shift toward higher energy and a third-order optical nonlinearity.
Journal ArticleDOI
Optical links on silicon photonic chips using ultralow-power consumption photonic-crystal lasers
Koji Takeda,Takuma Tsurugaya,Takuro Fujii,Akihiko Shinya,Yoshiho Maeda,Tai Tsuchizawa,Hidetaka Nishi,Masaya Notomi,Takaaki Kakitsuka,Shinji Matsuo +9 more
TL;DR: This paper numerically and experimentally demonstrated the coupling design between the LEAP lasers and Si waveguides, and achieved the first data transmission using an optical link consisting of a LEAP laser, Si waveguide, and photodetector.