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Proceedings Paper

Thermomechanical model of mirror laser damage at 1.06 um: II. Flat bottom pits formation
Author(s): Jean Dijon; Guillaume Ravel; Bernard Andre
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Paper Abstract

Other defects than nodules are responsible for laser damage of High Reflection coatings at 1.06 micrometers . Among them, flat bottom pits (FBP) are particularly interesting because they are surface induced damages not related with preexisting cosmetic defects. The damage morphology observed with a Scanning Electron Microscope suggest that damages are related to absorbing nanometric centers. Following this idea, a model of FBP formation is developed in this paper. This model predicts a size dependence of the FBP versus the thickness of the buckled layers; this fact is experimentally confirmed. Two different kinds of FBP have been observed; the second one might be related with the seed of nodular defects.

Paper Details

Date Published: 7 April 1999
PDF: 10 pages
Proc. SPIE 3578, Laser-Induced Damage in Optical Materials: 1998, (7 April 1999); doi: 10.1117/12.344395
Show Author Affiliations
Jean Dijon, CEA-LETI (France)
Guillaume Ravel, CEA-LETI (France)
Bernard Andre, CEA-LETI (France)

Published in SPIE Proceedings Vol. 3578:
Laser-Induced Damage in Optical Materials: 1998
Gregory J. Exarhos; Arthur H. Guenther; Mark R. Kozlowski; Keith L. Lewis; M. J. Soileau, Editor(s)

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