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Optical Engineering

Measurement of laser diode astigmatism
Author(s): Haiyin Sun
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Paper Abstract

Theoretical and experimental studies are presented on the two commonly used laser diode astigmatism measurement methods: the moving-diode method and the moving-profiler method. Both methods use lens(es) to focus the laser beam and a camera (or beam profiler) to locate the focal point of the focused beam. It is theoretically shown that the moving-diode method is valid when the distance between the diode and the lens is much larger than the lens focal length and the camera is positioned at a corresponding distance to the lens, and that virtually no calculation is required in a measurement. It is theoretically and experimentally shown that the moving-profiler method is valid when the measured data are elaborately processed using Gaussian optics and that the previous measurement with the measured data being processed by geometric optics was wrong.

Paper Details

Date Published: 1 April 1997
PDF: 6 pages
Opt. Eng. 36(4) doi: 10.1117/1.601147
Published in: Optical Engineering Volume 36, Issue 4
Show Author Affiliations
Haiyin Sun, Coherent, Inc. (United States)

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