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Proceedings Paper

Laser-induced surface damage density measurements of fused silica optics: a parametric study
Author(s): Laurent Lamaignère; Stéphane Reyné; Thierry Donval; Roger Courchinoux; Jean-Christophe Poncetta; Bertrand Bertussi; H. Bercegol
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Paper Abstract

The rasterscan test procedure implemented in order to determine low laser damage density of large aperture UV fused silica optics was improved in terms of accuracy and repeatability. Tests have been carried on several facilities using several pulse durations and spatial distributions. We describe the equipment, test procedure and data analysis to perform this damage test with small beams (Gaussian beams, about 1mm @ 1/e, and top hat beams). Then, beam overlap and beam shape are the two key parameters which are taken into account in order to determine damage density. After data analysis and treatment, a repeatable metrology has been obtained. Moreover, the consideration of error bars on defects distributions permits to compare data between these installations. This allows us to look for reproducibility, a necessary condition in order to share results and to make reliable predictions of laser damage resistance. For that, a careful attention has been paid to beam analysis.

Paper Details

Date Published: 31 December 2009
PDF: 6 pages
Proc. SPIE 7504, Laser-Induced Damage in Optical Materials: 2009, 75041C (31 December 2009); doi: 10.1117/12.836346
Show Author Affiliations
Laurent Lamaignère, CEA CESTA (France)
Stéphane Reyné, CEA CESTA (France)
Thierry Donval, CEA CESTA (France)
Roger Courchinoux, CEA CESTA (France)
Jean-Christophe Poncetta, CEA CESTA (France)
Bertrand Bertussi, CEA , Le Ripault (France)
H. Bercegol, CEA CESTA (France)

Published in SPIE Proceedings Vol. 7504:
Laser-Induced Damage in Optical Materials: 2009
Gregory J. Exarhos; Vitaly E. Gruzdev; Detlev Ristau; M. J. Soileau; Christopher J. Stolz, Editor(s)

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