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9 April 2002 Laser megajoule 1.06-μm mirror production with very high laser damage threshold
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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.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
B. Pinot, Herve Leplan, Francois Houbre, Eric Lavastre, Jean-Christophe Poncetta, and Genevieve Chabassier "Laser megajoule 1.06-μm mirror production with very high laser damage threshold", Proc. SPIE 4679, Laser-Induced Damage in Optical Materials: 2001, (9 April 2002);

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