Coherent light generators – Particular active media – Semiconductor
Patent
1992-03-27
1993-11-16
Epps, Georgia Y.
Coherent light generators
Particular active media
Semiconductor
372 96, H01S 319
Patent
active
052630412
ABSTRACT:
A surface emitting semiconductor laser includes a body of a semiconductor material having a pair of opposed surfaces and a plurality of active regions stacked one on the other between the surfaces. Each of the active regions includes a p-type conductivity layer, an n-type conductivity layer and an active layer therebetween. The active layer can either be intrinsic or a quantum well. The p-type and n-type layers are doped to provide a tunneling junction between the layers of adjacent active regions. The active layers of the active regions are spaced apart a multiple of one-half a wavelength to provide distributed feedback. Contacts are on the surfaces of the body with one of the contacts having an opening therethrough through which a generated light beam can emerge.
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Cohen Donald S.
Epps Georgia Y.
Hancock Earl C.
The University of Colorado Foundation Inc.
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