Semiconductor Lasers with Improved Temporal, Spectral, and Spatial Stability and Beam Profile Uniformity
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United States of America Patent
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Issued Date -
Apr 15, 2010
app pub date -
Oct 10, 2008
filing date -
Oct 10, 2008
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Abandoned
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Abstract
A method for improving spectral, spatial, and temporal stability of semiconductor lasers and their beam profile uniformity based on statistical average of plural transient or unsteady state longitudinal and lateral modes that are continuously perturbed. A laser module implementing the method comprises a semiconductor laser, a drive circuit generating RF-modulated drive current, and an automatic power control loop for producing stable, low noise and uniform or nearly uniform illumination field along one or two dimensions.
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