Curved grating surface-emitting distributed feedback laser

Details Curved grating surface-emitting distributed feedback laser Curved grating surface-emitting distributed feedback laser

1997-02-26

1999-02-02

Bovernick, Rodney B.

Coherent light generators

Particular resonant cavity

Distributed feedback

372102, H01S 319

Patent

active

058675213

ABSTRACT:
Surface-emitting distributed feedback (SEDFB) lasers having a curved grating with a shape that produces good beam quality. A preferred shape is one for which the grating curves away from the center of the gain region of the laser. The use of the curved grating of the present invention produces good beam quality from broad area SEDFB lasers with high power and high efficiency. The present invention overcomes self-induced filament formation and dynamic instabilities that limit achievable beam quality. The present invention provides for a holographic method for fabricating curved gratings for the SEDFB lasers that is consistent with laser batch processing.

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