Coherent light generators – Particular active media – Semiconductor
Patent
1991-03-26
1992-03-10
Epps, Georgia
Coherent light generators
Particular active media
Semiconductor
372 46, H01S 319
Patent
active
050954881
ABSTRACT:
A semiconductor laser formed into a double hetero junction structure comprising an n-type cladding layer and a p-type cladding layer with an active layer interposed therebetween. The p-type cladding layer has a laminated structure consisting of a first cladding layer of (Al.sub.x Ga.sub.1-x)InP disposed on one side adjacent to the active layer and a second cladding layer of Al.sub.y Ga.sub.1-y As disposed on the reverse side. A deterioration prevention layer of Al.sub.z Ga.sub.1-y As is included in the first cladding layer at a position spaced apart from the second cladding layer by a predetermined thickness. In addition, the second cladding layer is partially removed, and a current stricture layer is formed at the removed portion. Due to the above design, the semiconductor layer is capable of retaining high reliability with certainty.
Ikeda Masao
Mikata Yasue
Yamamoto Tadashi
Epps Georgia
Sony Corporation
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