Patent Number: 7,088,877

Title: Method and apparatus for tuning a bragg grating in a semiconductor substrate

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.

Inventors: Liu; Ansheng (Cupertino, CA), Paniccia; Mario J. (Santa Clara, CA), Nicolaescu; Remus (San Jose, CA)

Assignee: Intel Corporation

International Classification: G02F 1/295 (20060101)

Expiration Date: 8/08/02018