Optical waveguides – With optical coupler
Reexamination Certificate
2006-09-12
2006-09-12
Kim, Ellen E. (Department: 2874)
Optical waveguides
With optical coupler
C385S014000, C385S037000
Reexamination Certificate
active
07106922
ABSTRACT:
A tunable optical filter includes a tunable Fabry-Perot (FP) filter, two tunable waveguide Bragg gratings (WBGs) and a 2×2 3-dB coupler. In one embodiment, the WBGs are implemented in a silicon substrate using polysilicon filled trenches. The FP filter is implemented with two silicon nitride trench WBGs with a gap region between them. The FP filter and the WBGs are respectively tuned to transmit and reflect a selected wavelength. A broadband optical signal is propagated into a first port of the coupler. The coupler propagates half of the beam to one WBG and the other half to the other WBG. The WBGs reflect these portions back to the coupler, which then propagates the reflected portions to the FP filter.
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Blakely , Sokoloff, Taylor & Zafman LLP
Intel Corporation
Kim Ellen E.
LandOfFree
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