Patent ID: 8202750

Claim:
A method of manufacturing a device having a longitudinally extending laser stripe structure at one end of which is an end face window structure, comprising: forming a mask over a substrate at least in the vicinity of the position of forming the end face window structure; and growing a nitride type Group III-V compound semiconductor layer including an active layer over the portion on the substrate not covered by the mask, the active layer having a nitride type Group III-V compound semiconductor material containing at least In and Ga by diffusing In and Ga into the nitride type Group III-V compound semiconductor layer grown over the portion on the substrate where the longitudinally extending laser stripe structure is to be formed, wherein, the nitride type Group III-V compound semiconductor layer which includes the nitride type group III-V compound semiconductor material containing the at least In and Ga has a length along the longitudinal extent of the portion on the substrate where the longitudinally extending laser stripe structure is to be formed, the nitride type Group III-V compound semiconductor which includes the nitride type group III-V compound semiconductor material containing at least In and Ga has a band gap energy that varies in relationship to the pattern of the mask along the longitudinal extent of the position on the substrate where the longitudinally extending laser strip structure is to be formed.