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
More filters
Journal ArticleDOI
Photonic crystal lasers using wavelength-scale embedded active region
Shinji Matsuo,Tomonari Sato,Koji Takeda,Akihiko Shinya,Kengo Nozaki,Eiichi Kuramochi,Hideaki Taniyama,Masaya Notomi,Takuro Fujii,Koichi Hasebe,Takaaki Kakitsuka +10 more
TL;DR: In this paper, an embedded active region structure in which the wavelength-scale active region is buried with an InP PhC slab was proposed to improve the thermal resistance of the device.
Journal ArticleDOI
Heterogeneously integrated III-V/Si MOS capacitor Mach-Zehnder modulator
Tatsurou Hiraki,Takuma Aihara,Koichi Hasebe,Koji Takeda,Takuro Fujii,Takaaki Kakitsuka,Tai Tsuchizawa,Hiroshi Fukuda,Shinji Matsuo +8 more
TL;DR: In this paper, the authors demonstrate an MZ modulator with a 250µm-long InGaAsP/Si metal-oxide-semiconductor (MOS) capacitor phase-shifter and obtain a VπL of 0.09
Journal ArticleDOI
Directly modulated buried heterostructure DFB laser on SiO₂/Si substrate fabricated by regrowth of InP using bonded active layer.
TL;DR: The fabrication method is a promising way to fabricate high-efficiency lasers at a low cost and the use of a lateral current injection structure is important for forming a p-i-n junction using bonded thin film.
Journal ArticleDOI
Over 67 GHz Bandwidth and 1.5 V Vπ InP-Based Optical IQ Modulator With n-i-p-n Heterostructure
Yoshihiro Ogiso,Josuke Ozaki,Yuta Ueda,Norihide Kashio,Nobuhiro Kikuchi,Eiichi Yamada,Hiromasa Tanobe,Shigeru Kanazawa,Hiroshi Yamazaki,Yoshitaka Ohiso,Takuro Fujii,Masaki Kohtoku +11 more
TL;DR: In this paper, a high-bandwidth InP-based Mach-Zehnder modulator and in-phase/quadrature (IQ) modulators were proposed by combining an n-i-p-n heterostructure and a capacitively loaded traveling wave electrode.
Journal ArticleDOI
Directly modulated membrane lasers with 108 GHz bandwidth on a high-thermal-conductivity silicon carbide substrate
Suguru Yamaoka,Nikolaos-Panteleimon Diamantopoulos,Hidetaka Nishi,Ryo Nakao,Takuro Fujii,Koji Takeda,Tatsurou Hiraki,Takuma Tsurugaya,Shigeru Kanazawa,Hiromasa Tanobe,Takaaki Kakitsuka,Takaaki Kakitsuka,Tai Tsuchizawa,Fumio Koyama,Shinji Matsuo +14 more
TL;DR: In this paper, a membrane distributed reflector laser on a low-refractive-index and high-thermal-conductivity silicon carbide substrate was proposed to achieve a 42 GHz relaxation oscillation frequency.