Patent ID: 9722398
Date: 2017-08-01
CPC Classifications: B82Y,H01L,H01S

Claim:
1. A method for forming an optical device comprising: providing a gallium and nitrogen containing substrate member having a {20-21} crystalline surface region characterized by an off-cut orientation of −8 degrees to −2 degrees or 2 degrees to 8 degrees toward a c-plane, the gallium and nitrogen containing substrate member having a laser stripe region overlying a portion of the crystalline surface region, the laser stripe region having a first end and a second end; forming a first cleaved facet on the first end of the laser stripe region, the first cleaved facet having first laser scribed regions extending intermittently along a first upper edge of the first cleaved facet to provide a first saw tooth profile, wherein each of the first laser scribed regions forms a tooth of the first saw tooth profile, each of the first laser scribed regions is spaced from adjacent ones of the first laser scribed regions by smooth surfaces of the first cleaved facet, and a depth that the first laser scribed regions extend downward from the first upper edge toward the {20-21} crystalline surface region varies across the first cleaved facet; and forming a second cleaved facet on the second end of the laser stripe region, the second cleaved facet having second laser scribed regions extending intermittently along a second upper edge of the second cleaved facet to provide a second saw tooth profile, wherein each of the second laser scribed regions forms a tooth of the second saw tooth profile, each of the second laser scribed regions is spaced from adjacent ones of the second laser scribed regions by smooth surfaces of the second cleaved facet, and a depth that the second laser scribed regions extend downward from the second upper edge toward the {20-21} crystalline surface region varies across the second cleaved facet.