Coherent light generators – Particular active media – Semiconductor
Patent
1990-03-08
1991-06-04
Davie, James W.
Coherent light generators
Particular active media
Semiconductor
H01S 319
Patent
active
050220373
ABSTRACT:
A semiconductor laser device is disclosed which emits laser light from an end facet. The semiconductor laser device comprises a multi-layered structure formed on a semiconductor substrate, the multi-layered structure having an active layer for laser oscillation, and a pair of cleavage planes on the side of the multi-layered structure, wherein a graded-band-gap layer is formed on at least one of the cleavage planes, the graded-band-gap layer having a forbidden band gap which increases gradually with an increase in the distance from the cleavage plane, and the surface of the graded-band-gap layer constituting the end facet.
REFERENCES:
Journal of Applied Physics, vol. 46, No. 8, Aug. 1975, pp. 3542-3546, M. Konagi et al., "Graded-band-gap . . . Heterojunction Solar Cells".
Hayashi Hiroshi
Kaneiwa Shinji
Kawanishi Hidenori
Miyauchi Nobuyuki
Morimoto Taiji
Davie James W.
Sharp Kabushiki Kaisha
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