Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2005-03-15
2005-03-15
Ullah, Akm Enayet (Department: 2874)
Optical waveguides
With optical coupler
Particular coupling structure
C385S123000, C385S129000, C359S333000
Reexamination Certificate
active
06868210
ABSTRACT:
An optical transmitter/receiver module of wavelength division multiplexing type which undergoes a reduced excess loss resulting from the displacement of a dicing position is fabricated with a high yield rate. An optical waveguide for guiding reflected light from a wavelength selection filter has a core substantially larger in size than the core of each of the other optical waveguides.
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Ido Tatemi
Sano Hirohisa
Shibata Tomoaki
Takahashi Makoto
Hitachi , Ltd.
Hitachi Chemical Co. Ltd.
Mattingly, Stanger, Malur & Brundige, P.C.
Ullah Akm Enayet
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