M
Masahiro Yanagisawa
Researcher at Nippon Telegraph and Telephone
Publications - 121
Citations - 1462
Masahiro Yanagisawa is an academic researcher from Nippon Telegraph and Telephone. The author has contributed to research in topics: Waveguide (optics) & Core (optical fiber). The author has an hindex of 19, co-authored 121 publications receiving 1456 citations. Previous affiliations of Masahiro Yanagisawa include Shizuoka University.
Papers
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Patent
Wave transmission medium and waveguide circuit
Toshikazu Hashimoto,Ogawa Ikuo,Takeshi Kitagawa,Senichi Suzuki,Masahiro Yanagisawa,Tomohiro Shibata,Masaki Koutoku,Hiroshi Takahashi,R. Nagase,Kobayashi Masaru,Shuichiro Asakawa,Yoshiteru Abe,Tsutomu Kitoh,Takaharu Ohyama +13 more
TL;DR: In this article, the spatial distribution of the index of refraction in a medium can be determined that there is no phase difference between the propagated light and the reversely propagated Light at each point (x, z).
Patent
Opto-electronic hybrid integration platform, optical sub-module, opto-electronic hybrid integration circuit, and process for fabricating platform
Toshikazu Hashimoto,Kuniharu Kato,Shinji Mino,Kazuyuki Moriwaki,Ogawa Ikuo,Akio Sugita,Hiroshi Terui,Yasufumi Yamada,Masahiro Yanagisawa,Kaoru Yoshino +9 more
TL;DR: In this paper, an opto-electronic hybrid integrated circuit was proposed to satisfy a low-loss optical waveguide function, an optical bench function and a high-frequency electrical wiring function.
Journal ArticleDOI
Application of planar lightwave circuit platform to hybrid integrated optical WDM transmitter/receiver module
Y. Yamada,S. Suzuki,Kazuyuki Moriwaki,Yoshinori Hibino,Yuichi Tohmori,Y. Akutsu,Y. Nakasuga,Toshikazu Hashimoto,Hiroshi Terui,Masahiro Yanagisawa,Yasuyuki Inoue,Akahori Yuji,R. Nagase +12 more
TL;DR: In this article, an optical WDM module with a simple configuration using a PLC platform together with a spot-size converted LD (SS-LD) and a waveguide PD (WG-PD) was fabricated.
Journal ArticleDOI
Multichip optical hybrid integration technique with planar lightwave circuit platform
Toshikazu Hashimoto,Y. Nakasuga,Y. Nakasuga,Y. Yamada,Y. Yamada,Hiroshi Terui,Hiroshi Terui,Masahiro Yanagisawa,Masahiro Yanagisawa,Akahori Yuji,Yuichi Tohmori,Kuniharu Kato,Yasuhiro Suzuki +12 more
TL;DR: In this paper, a two-step bonding technique for optical device assembly on a planar lightwave circuit platform was developed, which consists of a chip-by-chip thermo-compression prebonding step and a simultaneous reflow bonding step.
Journal ArticleDOI
New structure of silica-based planar lightwave circuits for low-power thermooptic switch and its application to 8 /spl times/ 8 optical matrix switch
TL;DR: In this article, the authors proposed a novel structure that reduces the switching power of a silica-based thermooptic switch, which consists of silicon trenches and heat insulating grooves, which are formed beneath and beside the arms of a Mach-Zehnder interferometer.