Laser diode device having a substantially circular light output

Details Laser diode device having a substantially circular light output Laser diode device having a substantially circular light output

1997-12-05

2000-04-18

Davie, James W.

Coherent light generators

Particular active media

Semiconductor

372 45, 372 50, H01S 3085

Patent

active

060523972

ABSTRACT:
A device and method for fabricating a high power laser diode device with an output emission with a nearly circular mode profile for efficient coupling into an optical fiber. A vertical taper waveguide and a window tolerance region are formed in a base structure of the device employing successive etching steps. Further regowth completes the device structure. The resultant laser device has a vertical and lateral tapered waveguide that adiabatically transforms the highly elliptical mode profile in an active gain section of the device into a substantially circular mode profile in a passive waveguide section of the device.

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