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Proceedings Paper

Laser megajoule 1.06-um mirror production with very high laser damage threshold
Author(s): B. Pinot; Herve Leplan; Francois Houbre; Eric Lavastre; Jean-Christophe Poncetta; Genevieve Chabassier
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Paper Abstract

As part of the LMJ (Laser Megajoule) program, CEA is building the LIL laser with full size optics and LMJ requirements. SAGEM has been selected as the supplier of large optical components and coatings with very high laser- induced damage threshold. Including spare parts, about 100 mirrors 610*430 mm2 with LIDT-3ns>25 J/cm2 have to be produced. Using a 5 m3 vacuum chamber and the 100 J/cm2 mirror coating process developed at CEA-LETI, with Hafnium and SiO2 materials, we are now typically in a serial production phase. To date, about thirty mirrors have been delivered. This paper focuses on the acceptance tests performed after coating, at SAGEM then CEA: LIDT measurement and Raster-Scan on samples; reflectance mapping on CEA automatic photometer; reflected wavefront deformation with &nullset; 800 mm/1ω CEA interferometer.

Paper Details

Date Published: 9 April 2002
PDF: 8 pages
Proc. SPIE 4679, Laser-Induced Damage in Optical Materials: 2001, (9 April 2002); doi: 10.1117/12.461687
Show Author Affiliations
B. Pinot, SAGEM SA (France)
Herve Leplan, SAGEM SA (France)
Francois Houbre, SAGEM SA (France)
Eric Lavastre, CEA-CESTA (France)
Jean-Christophe Poncetta, CEA-CESTA (France)
Genevieve Chabassier, CEA-CESTA (France)

Published in SPIE Proceedings Vol. 4679:
Laser-Induced Damage in Optical Materials: 2001
Gregory J. Exarhos; Arthur H. Guenther; Keith L. Lewis; M. J. Soileau; Christopher J. Stolz, Editor(s)

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