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Proceedings Paper

Limits of performance: CW laser damage
Author(s): Rashmi S. Shah; Justin J. Rey; Alan F. Stewart
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Paper Abstract

High performance optical coatings are an enabling technology for many applications - navigation systems, telecom, fusion, advanced measurement systems of many types as well as directed energy weapons. The results of recent testing of superior optical coatings conducted at high flux levels have been presented. Failure of these coatings was rare. However, induced damage was not expected from simple thermal models relating flux loading to induced temperatures. Clearly, other mechanisms must play a role in the occurrence of laser damage. Contamination is an obvious mechanism-both particulate and molecular. Less obvious are structural defects and the role of induced stresses. These mechanisms are examined through simplified models and finite element analysis. The results of the models are compared to experiment, for induced temperatures and observed stress levels. The role of each mechanism is described and limiting performance is determined.

Paper Details

Date Published: 15 January 2007
PDF: 14 pages
Proc. SPIE 6403, Laser-Induced Damage in Optical Materials: 2006, 640305 (15 January 2007); doi: 10.1117/12.695918
Show Author Affiliations
Rashmi S. Shah, The Boeing Co. (United States)
Justin J. Rey, The Boeing Co. (United States)
Alan F. Stewart, The Boeing Co. (United States)

Published in SPIE Proceedings Vol. 6403:
Laser-Induced Damage in Optical Materials: 2006
Gregory J. Exarhos; Arthur H. Guenther; Keith L. Lewis; Detlev Ristau; M. J. Soileau; Christopher J. Stolz, Editor(s)

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