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Proceedings Paper

The impact of laser damage on the lifetime of optical components in fusion lasers
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Paper Abstract

The purpose of this paper is to gather experimental elements allowing for the prediction of laser damage on full size components installed on high power Nd-glass laser lines. Damage can initiated on material defects, which aren’t known in their nature, but the density of which can be measured. On transmissive optics, depending on the component thickness, and on the intensity distribution at the front surface, rear surface damage can also appear due to self-focusing of hot spots. These two contributions produce damage sites that are prone to grow. The growth rate has been shown to be proportional to the damaged area. The resulting exponential growth is the major limitation to the lifetime of optics. A representation of these phenomena in the plane Intensity/Fluence gives a practical description of the impact of laser damage on the lifetime of optical components. It also enlightens the comparison between different operating conditions.

Paper Details

Date Published: 10 June 2004
PDF: 13 pages
Proc. SPIE 5273, Laser-Induced Damage in Optical Materials: 2003, (10 June 2004); doi: 10.1117/12.524843
Show Author Affiliations
Herve Bercegol, CEA-CESTA (France)
Philippe R. Bouchut, CEA-LETI (France)
Laurent Lamaignere, CEA-CESTA (France)
Bruno Le Garrec, CEA-CESTA (France)
Gerard Raze, CEA-CESTA (France)

Published in SPIE Proceedings Vol. 5273:
Laser-Induced Damage in Optical Materials: 2003
Gregory J. Exarhos; Arthur H. Guenther; Norbert Kaiser; Keith L. Lewis; M. J. Soileau; Christopher J. Stolz, Editor(s)

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