Coherent light generators – Particular active media – Semiconductor
Patent
1990-02-12
1991-04-09
Epps, Georgia
Coherent light generators
Particular active media
Semiconductor
372 50, 357 17, H01S 319
Patent
active
050070630
ABSTRACT:
The present invention relates to a laser diode which comprises a substantially rectangular body of a semiconductor material on the surface of a semiconductor substrate. The body has a pair of opposed end surfaces and side surfaces extending between the end surfaces. The body comprises a multiple quantum well active layer between cladding layers. An electrically insulating (separation) region extends through one of the cladding layers and through the active region to divide the body into a laser diode in which light is generated in the active layer by the recombination of oppositely charged carriers, and an absorber which can shift the generated light between the TE and TM modes when a small voltage is applied thereacross. A capping layer of an insulating semiconductor material is over the outermost cladding layer and conductive regions extend through the capping layer to the cladding layer in each of the laser diode and the absorber.
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Eastman Kodak Company
Epps Georgia
Owens Raymond L.
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