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Proceedings Paper

SOI-based photonic crystal line-defect waveguides
Author(s): Koji Yamada; Masaya Notomi; Akihiko Shinya; Itaru Yokohama; Tetsufumi Shoji; Tai Tsuchizawa; Toshifumi Watanabe; Jun-Ichi Takahashi; Emi Tamechika; Hirofumi Morita
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Paper Abstract

We have experimentally demonstrated single-mode light-wave transmission and tunable waveguiding characteristics in photonic crystal (PC) waveguides constructed on a silicon-on-insulator (SOI) substrate as is most likely to be used for the a large scale integration of photonic circuits. Although off-plane diffractive leakage has been a serious problem in SOI-PC waveguides, we have overcome this problem in our narrow line-defect and phase-shifted-hole line-defect waveguide structures. These devices were developed through intensive theoretical studies on PC line-defect waveguieds. We have also demonstrated low-loss mode profile converter that will enable efficient connection between conventional silica-based waveguides and PC line-defect waveguides. The converter features an inversely-tapered silicon wire waveguide with an ultra-thin tip constructed on an SOI substrate. In our experiments, this converter proved capable of coupling loss as low as 0.5dB per conversion. These SOI-based devices represent an important step towards practical large-scale integrated photonic crystal circuits.

Paper Details

Date Published: 11 July 2002
PDF: 15 pages
Proc. SPIE 4870, Active and Passive Optical Components for WDM Communications II, (11 July 2002); doi: 10.1117/12.475545
Show Author Affiliations
Koji Yamada, NTT Telecommunications Energy Labs. (Japan)
Masaya Notomi, NTT Basic Research Labs. (Japan)
Akihiko Shinya, NTT Basic Research Labs. (Japan)
Itaru Yokohama, NTT Basic Research Labs. (Japan)
Tetsufumi Shoji, NTT Telecommunications Energy Labs (Japan)
Tai Tsuchizawa, NTT Telecommunications Energy Labs. (Japan)
Toshifumi Watanabe, NTT Telecommunications Energy Labs. (Japan)
Jun-Ichi Takahashi, NTT Telecommunications Energy Labs. (Japan)
Emi Tamechika, NTT Telecommunications Energy Labs. (Japan)
Hirofumi Morita, NTT Telecommunications Energy Labs. (Japan)

Published in SPIE Proceedings Vol. 4870:
Active and Passive Optical Components for WDM Communications II
Achyut Kumar Dutta; Abdul Ahad Sami Awwal; Niloy K. Dutta; Katsunari Okamoto, Editor(s)

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