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Proceedings Paper

Optical Distortion And Far Field Measurements For Laser Window Materials
Author(s): John A. Detrio
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Paper Abstract

Laser-induced optical distortion in laser window materials may seriously impair the performance of a high power optical system. The distortions result from refractive index changes produced by laser-induced thermal gradients. The thermo-optic effect (dn/dT), thermal expansion, and stress-optic effect all contribute to the loss of far field intensity. Experimental measurements of thermal lensing in ZnSe and experiments to monitor the distortion of laser-irradiated fluoride materials are presented. For a well behaved Gaussian beam profile the window distortion produces a thermal lensing effect in ZnSe which changes the focus but produces only slight distortion; refocusing of the optical system can restore the on-target intensity in this situation. In general, the laser-induced distortions will follow the beam profile variations. Irregular beam intensity profiles introduce greater distortion than uniform beam profiles.

Paper Details

Date Published: 30 December 1981
PDF: 8 pages
Proc. SPIE 0293, Wavefront Distortions in Power Optics, (30 December 1981); doi: 10.1117/12.932332
Show Author Affiliations
John A. Detrio, University of Dayton Research Institute (United States)

Published in SPIE Proceedings Vol. 0293:
Wavefront Distortions in Power Optics
Claude A. Klein, Editor(s)

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