Coherent light generators – Particular active media – Semiconductor
Patent
1996-02-02
1998-06-02
Davie, James W.
Coherent light generators
Particular active media
Semiconductor
H01S 319
Patent
active
057612323
ABSTRACT:
A double heterojunction semiconductor laser includes a semiconductor substrate of a first semiconductor material having a first conductivity type; successively disposed on the semiconductor substrate, a first cladding layer of the first conductivity type, an active layer, and a second cladding layer of a second conductivity type, opposite the first conductivity type, the second cladding layer having a central ridge including side surfaces and a top surface; a current blocking layer of the first conductivity type disposed on the second cladding layer and contacting the side surfaces of the ridge; a second conductivity type contact layer of the first semiconductor material disposed on the top surface of the ridge and on the current blocking layer; and first and second electrodes contacting the semiconductor substrate and the contact layer, respectively, wherein at least one of the first and second cladding layers is a superlattice layer including a plurality of alternating layers of different compositions, the superlattice layer lattice matching with the first semiconductor material.
REFERENCES:
patent: 5272712 (1993-12-01), Arimoto et al.
patent: 5619518 (1997-04-01), Horie et al.
Davie James W.
Mitsubishi Denki & Kabushiki Kaisha
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