Spatially coherent diode laser with lenslike media and feedback from straight-toothed gratings
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United States of America Patent
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Mar 10, 1998
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N/A
app pub date -
Mar 26, 1996
filing date -
Mar 26, 1996
priority date (Note) -
Expired
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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.
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