Coherent light generators – Particular active media – Semiconductor
Patent
1988-03-09
1989-11-21
Davie, James W.
Coherent light generators
Particular active media
Semiconductor
H01S 319
Patent
active
048827347
ABSTRACT:
A quantum well heterostructure laser has low current density threshold and high T.sub.O values and includes a plurality of contiguous semiconductor layers formed on a substrate wherein one or more the layers form an active region capable of quantization of electron states. The active region is confined by a pair of outer superlattice regions which provide optical confinement and low thermal resistance while preventing the development of antiwaveguiding properties. Many configurations are shown to demonstrate the many forms that the overall laser structure can take and, in particular, the nature of the outer or inner cladding regions of different superlattice geometries and forms.
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Burnham Robert D.
Scifres Donald R.
Carothers, Jr. W. Douglas
Davie James W.
Xerox Corporation
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