Dr. Toshifumi Watanabe Profile

Dr. Toshifumi Watanabe

Senior Research Engineer at Nippon Telegraph and Telephone Corp

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Publications (7)

Proceedings Article | 17 February 2010 Paper

Integrated photonic devices based on silicon photonic wire waveguide platform

Koji Yamada, Hiroshi Fukuda, Tai Tsuchizawa, Toshifumi Watanabe, Hiroyuki Shinojima, Hidetaka Nishi, Songbong Park, Yasuhiko Ishikawa, Kazumi Wada, Sei-ichi Itabashi

Proceedings Volume 7606, 76060T (2010) https://doi.org/10.1117/12.840889

KEYWORDS: Waveguides, Polarization, Silicon photonics, Germanium, Silicon, Optical fibers, Photodiodes, Signal attenuation, Integrated photonics, Photonic devices

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Proceedings Article | 18 February 2009 Paper

Polarization diversity circuit based on a double-core structure consisting of silicon photonic wire and silicon-oxinitride waveguide

Koji Yamada, Hiroshi Fukuda, Tai Tsuchizawa, Toshifumi Watanabe, Hiroyuki Shinojima, Hidetaka Nishi, Sei-ichi Itabashi

Proceedings Volume 7220, 722002 (2009) https://doi.org/10.1117/12.808066

KEYWORDS: Polarization, Waveguides, Silicon, Silicon photonics, Refractive index, Resonators, Optical testing, Mineralogy, Directional couplers, Data transmission

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Proceedings Article | 11 November 2008 Paper

Applications of nonlinear effects in silicon wire waveguides: all-optical modulation, wavelength conversion, and quantum entanglement

K. Yamada, T. Tsuchizawa, T. Watanabe, H. Fukuda, H. Shinojima, H. Nishi, H. Takesue, T. Tanabe, A. Shinya, E. Kuramochi, M. Notomi, Y. Tokura, S. Itabashi

Proceedings Volume 7134, 71341R (2008) https://doi.org/10.1117/12.803760

KEYWORDS: Waveguides, Silicon, Modulation, Silicon photonics, Switching, Picosecond phenomena, Absorption, Interferometers, Photonic crystals, Wave propagation

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Proceedings Article | 10 September 2007 Paper

Si wire waveguide devices

T. Watanabe, K. Yamada, T. Tsuchizawa, H. Fukuda, H. Shinojima, S. Itabashi

Proceedings Volume 6775, 67750K (2007) https://doi.org/10.1117/12.733512

KEYWORDS: Silicon, Waveguides, Polarization, Brain-machine interfaces, Wave propagation, Signal attenuation, Transmittance, Scanning electron microscopy, Optical components, Line edge roughness

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Proceedings Article | 25 March 2005 Paper

Ultrasmall resonant tunneling/dropping devices in 2D photonic crystal slabs

Akihiko Shinya, Satoshi Mitsugi, Eiichi Kuramochi, Takasumi Tanabe, G. Kim, Go Kira, Shingo Kondo, Kouji Yamada, Toshifumi Watanabe, Tai Tsuchizawa, Masaya Notomi

Proceedings Volume 5729, (2005) https://doi.org/10.1117/12.592631

KEYWORDS: Waveguides, Resonators, Photonic crystals, Optical filters, Nonlinear filtering, Optical switching, Light wave propagation, Silicon, Switching, Cladding

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Proceedings Article | 9 July 2003 Paper

Functional components in SOI photonic crystal slabs

Akihiko Shinya, Masaya Notomi, Eiichi Kuramochi, Tetsuhumi Shoji, Toshihumi Watanabe, Tai Tsuchizawa, Kouji Yamada, Hirofumi Morita

Proceedings Volume 5000, (2003) https://doi.org/10.1117/12.480057

KEYWORDS: Waveguides, Cladding, Light wave propagation, Photonic crystals, Photonic integrated circuits, Single mode fibers, Polymer multimode waveguides, Polymers, Silicon, Dispersion

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Proceedings Article | 11 July 2002 Paper

SOI-based photonic crystal line-defect waveguides

Koji Yamada, Masaya Notomi, Akihiko Shinya, Itaru Yokohama, Tetsufumi Shoji, Tai Tsuchizawa, Toshifumi Watanabe, Jun-Ichi Takahashi, Emi Tamechika, Hirofumi Morita

Proceedings Volume 4870, (2002) https://doi.org/10.1117/12.475545

KEYWORDS: Waveguides, Silicon, Dispersion, Waveguide modes, Photonic crystals, Silica, Crystals, Photonic integrated circuits, Cladding, Transmittance

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Showing 5 of 7 publications

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