Coherent light generators – Particular resonant cavity – Distributed feedback
Patent
1996-03-26
1998-03-10
Davie, James W.
Coherent light generators
Particular resonant cavity
Distributed feedback
372 45, H01S 310, H01S 319
Patent
active
057270163
ABSTRACT:
In a surface emitting semiconductor laser, a variable index of refraction layer having an approximately parabolically shaped trough therein is positioned adjacent the active lasing region and a straight toothed second order diffraction grating coacts with the refraction layer to produce a broad spatially coherent output beam.
REFERENCES:
patent: 5164956 (1992-11-01), Lang
patent: 5345466 (1994-09-01), Macomber
patent: 5602863 (1997-02-01), Itagaki
Davie James W.
Nathans Robert L.
The United States of America as represented by the Secretary of
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