Patent ID: 9543738
Date: 2017-01-10
CPC Classifications: B28D,B82Y,H01L,H01S

Claim:
1. A laser diode device comprising: a gallium and nitrogen containing material including a {20-21} crystalline surface region; an n-type cladding material overlying the gallium and nitrogen containing material, the n-type cladding material being free from AlGaN; an active region comprising at least three quantum wells and a plurality of GaN barrier layers, each of the quantum wells having a thickness of 1 nm or greater and less than 4 nm, and each of the plurality of GaN barrier layers being free from Al and having a thickness of between 1.5 nm to 2.5 nm, each adjacent pair of the quantum wells separated by one of the plurality of GaN barrier layers; a p-type cladding material overlying the active region, the p-type cladding material being free from AlGaN; a p++ contact region overlying the p-type cladding material; a laser stripe region overlying the crystalline surface region, the laser stripe region being aligned substantially in a projection of the c-direction, the laser stripe region comprising a first end and a second end; a first facet formed on the first end; and a second facet formed on the second end; wherein the active region is configured to operate at a forward voltage of less than 7 volts.