Coherent light generators – Particular active media – Semiconductor
Patent
1996-06-26
1998-08-04
Bovernick, Rodney B.
Coherent light generators
Particular active media
Semiconductor
372108, 359719, 359711, 359741, H01S 318, G02B 302, G02B 306, G02B 308
Patent
active
057905762
ABSTRACT:
Coherent light sources combining a semiconductor optical source with a light diverging region, such as a flared resonator type laser diode or flared amplifier type MOPA, with a single lens adapted to correct the astigmatism of the light beam emitted from the source is disclosed. The lens has an acircular cylindrical or toroidal first surface and an aspheric or binary diffractive second surface. The first surface has a curvature chosen to substantially equalize the lateral and transverse divergences of the astigmatic beam. Sources with an array of light diverging regions producing an array of astigmatic beams and a single astigmatism-correcting lens array aligned with the beams are also disclosed. The single beam source can be used in systems with frequency converting nonlinear optics. The array source can be stacked with other arrays to produce very high output powers with high brightness.
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Endriz John
Lang Robert J.
Osinski Julian S.
Waarts Robert G.
Wolak Edmund L.
Bovernick Rodney B.
Carothers, Jr. W. Douglas
Leung Quyen Phen
SDL Inc.
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