Coherent light generators – Particular active media – Semiconductor
Patent
1989-06-15
1990-10-23
Sikes, William L.
Coherent light generators
Particular active media
Semiconductor
372 46, 372 50, H01S 319
Patent
active
049658069
ABSTRACT:
A broad-area semiconductor laser diode includes an active lasing region interposed between an upper and a lower cladding layer, the laser diode further comprising structure for controllably varying a lateral refractive index profile of the diode to substantially compensate for an effect of junction heating during operation. In embodiments disclosed the controlling structure comprises resistive heating strips or non-radiative linear junctions disposed parallel to the active region. Another embodiment discloses a multi-layered upper cladding region selectively disordered by implanted or diffused dopant impurities. Still another embodiment discloses an upper cladding layer of variable thickness that is convex in shape and symmetrically disposed about a central axis of the active region. The teaching of the invention is also shown to be applicable to arrays of semiconductor laser diodes.
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Ashby Carol I. H.
Hadley G. Ronald
Hohimer John P.
Owyoung Adelbert
Chafin James H.
Daniel Anne D.
Epps Georgia Y.
Moser William R.
Sikes William L.
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