Optical waveguides – Planar optical waveguide
Reexamination Certificate
2005-08-01
2010-12-21
Healy, Brian M. (Department: 2883)
Optical waveguides
Planar optical waveguide
C385S015000, C385S043000, C385S050000, C385S130000, C385S131000, C385S132000
Reexamination Certificate
active
07856163
ABSTRACT:
A planar lightwave circuit is provided which can be easily fabricated by an existing planar-lightwave-circuit fabrication process, which can lower the propagation loss of signal light and which can convert inputted signal light so as to derive desired signal light. A planar lightwave circuit having a core and a clad which are formed on a substrate, has input optical waveguide(s) (111) which inputs signal light, mode coupling part (112) for coupling a fundamental mode of the inputted signal light to a higher-order mode and/or a radiation mode, or mode re-coupling part (113) for re-coupling the higher-order mode and/or the radiation mode to the fundamental mode, and output optical waveguide(s) (114) which outputs signal light. The mode coupling part or the mode re-coupling part is an optical waveguide which has core width and/or height varied continuously.
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Hashimoto Toshikazu
Hida Yasuhiro
Ishii Motohaya
Kitoh Tsutomu
Saida Takashi
Anderson Guy G
Healy Brian M.
Nippon Telegraph and Telephone Corporation
Workman Nydegger
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