Patent ID: 6118801
Filing Date: 2000-09-12
Classification: B82Y,H01S

Abstract:
A nitride-based compound semiconductor laser comprising:an active layer having a cyclic structure formed by cyclically stacking not less than two types of semiconductor layers;first and second cladding layers of first and second conductivity types formed to sandwich said active layer so as to form a double-heterojunction structure;first and second electrodes connected to said first and second cladding layers;a current blocking layer formed between said second electrode and said second cladding layer and having a striped opening portion for constricting a current for said double-heterojunction structure; anda current injection layer formed between said second electrode and said current blocking layer and in said opening portion and having an area larger than that of said opening portion,wherein each of said first and second cladding layers, said current blocking layer, said current injection layer consists essentially of a material represented by the following composition formula:In.sub.x Ga.sub.y Al.sub.z Nwhere x+y+z=1, and 0.ltoreq.x, y, z.ltoreq.1, andwhen a thickness of said current blocking layer is represented by TA, and a thickness of said current injection layer excluding a portion in said opening portion is represented by TC, a condition of TC<TA is satisfied.