Optical waveguides – Directional optical modulation within an optical waveguide – Electro-optic
Reexamination Certificate
2005-09-20
2005-09-20
Nguyen, Thong (Department: 2872)
Optical waveguides
Directional optical modulation within an optical waveguide
Electro-optic
C385S002000, C385S008000, C385S129000, C359S237000, C359S245000, C359S288000
Reexamination Certificate
active
06947616
ABSTRACT:
A tunable Bragg grating method and apparatus. In one aspect of the present invention, a method according to an embodiment of the present invention includes directing an optical beam into a first end of an optical path having the first end and a second end disposed in a semiconductor substrate, reflecting a first portion of the optical beam having a first center wavelength back out from the first end of the optical path and tuning the optical path to reflect a second portion of the optical beam having a second center wavelength back out from the first end of the optical path. In one embodiment, the Bragg grating is tuned with a heater used to adjust a temperature of the semiconductor substrate. In another embodiment, charge in charge modulated regions along the optical path is modulated to tune the Bragg grating.
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Liu Ansheng
Nicolaescu Remus
Paniccia Mario J.
Blakely , Sokoloff, Taylor & Zafman LLP
Intel Corporation
Nguyen Thong
Pritchett Joshua L
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