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Proceedings Paper

Integrated photonic devices based on silicon photonic wire waveguide platform
Author(s): Koji Yamada; Hiroshi Fukuda; Tai Tsuchizawa; Toshifumi Watanabe; Hiroyuki Shinojima; Hidetaka Nishi; Songbong Park; Yasuhiko Ishikawa; Kazumi Wada; Sei-ichi Itabashi
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Paper Abstract

Silicon photonic wire waveguides, featuring very strong optical confinement and compatibility with silicon electronics, provide a compact photonic platform on which passive, dynamic, and active photonic devices can be integrated. We have already developed a low-loss waveguide platform and integrated various photonic devices. For passive devices, we have developed polarization-independent wavelength filters using a monolithically integrated polarization diversity circuit, in which waveguide-based polarization manipulation devices are implemented. The polarization-dependent loss of a ring resonator wavelength filter with polarization diversity is less than 1 dB. For dynamic devices, we have developed compact carrier-injection-type variable optical attenuators (VOAs). The length of the device is less than one millimeter, and the response time is nanosecond order. The device has already been made polarization independent. We have recently monolithically integrated these fast VOAs with low-dark-current germanium photodiodes and achieved synchronized operation of these devices. For nonlinear devices, a free-carrier extraction structure using a PIN junction implemented in the waveguide can increase the efficiency of nonlinear functions. For example, in a wavelength conversion based on the Four-wave-mixing effect, the conversion efficiency can be increased by 6 dB.

Paper Details

Date Published: 16 February 2010
PDF: 8 pages
Proc. SPIE 7606, Silicon Photonics V, 76060T (16 February 2010); doi: 10.1117/12.840889
Show Author Affiliations
Koji Yamada, NTT Corp. (Japan)
Hiroshi Fukuda, NTT Corp. (Japan)
Tai Tsuchizawa, NTT Corp. (Japan)
Toshifumi Watanabe, NTT Corp. (Japan)
Hiroyuki Shinojima, NTT Corp. (Japan)
Hidetaka Nishi, NTT Corp. (Japan)
Songbong Park, NTT Corp. (Japan)
Yasuhiko Ishikawa, The Univ. of Tokyo (Japan)
Kazumi Wada, The Univ. of Tokyo (Japan)
Sei-ichi Itabashi, NTT Corp. (Japan)

Published in SPIE Proceedings Vol. 7606:
Silicon Photonics V
Joel A. Kubby; Graham T. Reed, Editor(s)

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