Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2005-03-01
2008-10-21
Leung, Quyen P (Department: 2874)
Optical waveguides
With optical coupler
Particular coupling structure
Reexamination Certificate
active
07440658
ABSTRACT:
A photonic crystal directional coupler composed of at least two linear defect waveguides introduced into a photonic crystal. The medium constant and the lattice constant of the photonic crystal at the photonic crystal directional coupling part, the sizes and shapes of the elements constituting the periodical structure of the photonic crystal are varied. Thereby the difference in propagation constant between the even and odd modes of the photonic crystal directional coupling part is increased, thus shortening the coupling length of the photonic crystal directional coupler.
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English language machine translation of JP 2003-295143-A, printed May 27, 2008.
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International Preliminary Report mailed on Dec. 7, 2006.
International Search Report mailed Jul. 5, 2005.
International Preliminary Report mailed on Sep. 14, 2006.
Furuya Katsumi
Komori Kazuhiro
Watanabe Yoshinori
Yamamoto Noritsugu
Japan Science and Technology Agency
Leung Quyen P
National Institute of Advanced Industrial Science and Technology
Rader & Fishman & Grauer, PLLC
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