Wavelength locked laser including integrated wavelength...

Details Wavelength locked laser including integrated wavelength... Wavelength locked laser including integrated wavelength...

2005-04-12

2008-11-11

Harvey, Minsun (Department: 2828)

Coherent light generators

Particular active media

Semiconductor

Reexamination Certificate

active

07450623

ABSTRACT:
An integrated light emitting semiconductor device having integrated feedback for wavelength locking comprises a semiconductor substrate including a waveguide region having a gain section having a gain media therein, and an out-coupling perturbation integrated with the device disposed proximate to the waveguide. A total internal reflection (TIR) structure for providing optical feedback is integrated with the device and disposed in a spaced apart relation relative to the out-coupling perturbation. At least one of the out-coupling perturbation and the TIR structure include a grating or prism to provide dispersion to send different wavelengths of light in different directions. The out-coupling perturbation is preferably a grating that has a grating period that is small enough to allow for only the +1 diffracted order to propagate.

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