Patent ID: 9343871
Filing Date: 2016-05-17
CPC Classification: H01S

Claim Text:
1. A gallium and nitrogen containing laser device, the device comprising: a gallium and nitrogen containing surface having either a nonpolar orientation or a semipolar orientation; a cladding region overlying the gallium and nitrogen containing surface, the cladding region having an AlN mol fraction of less than about 2%; a cavity region overlying the gallium and nitrogen containing surface and configured in alignment in substantially a c-direction or a projection of the c-direction, the cavity region being characterized by a first end and a second end; the first end comprising a first etched facet; the second end comprising a second etched facet wherein the first etched facet and the second etched facet are at an angle of between 87 degrees and 93 degrees from the gallium and nitrogen containing surface, and the first etched facet and the second etched facet have a root mean square roughness of 50 nm or less; a first optical coating overlying the first etched facet, wherein the first optical coating is configured to increase a reflectivity of the first etched facet to a laser beam generated in the cavity region, the first optical coating comprising a first layer of SiO a second optical coating overlying the second etched facet, wherein the second optical coating is configured to reduce a reflectivity of the second etched facet to the laser beam generated in the cavity region, the second optical coating comprising a first layer of SiO