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Proceedings Paper

Large-area sol-gel highly reflective coatings processed by the dipping technique
Author(s): Philippe F. Belleville; Philippe M. Pegon
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Paper Abstract

The Centre d'Etudes de Limeil-Valenton is currently involved in a project which consists of the construction of a 2 MJ/500TW pulsed Nd:glass laser devoted to inertial confinement fusion research. With 240 laser beams, the proposed megajoule-class laser conceptual design necessitates 44-cm X 44-cm X 6-cm cavity-end mirrors representing more than 50-m2 of coated area. These dielectric mirrors are made of quarterwave stacks of SiO2 and ZrO2-PVP and are prepared from colloidal suspensions using the sol-gel route. After a sustained search effort, we have prepared (SiO2/ZrO2- PVP)10 mirrored coatings with up to 99 percent reflection at 1053-nm and for different incidence use. Adequate laser-conditioned damage thresholds ranging 14-15 J/cm2 at 1053-nm wavelength and with 3-ns pulse duration were achieved. Large-area mirrors with good coating uniformity and weak edge-effect were produced by dip-coating at room temperature and atmospheric pressure.

Paper Details

Date Published: 13 May 1997
PDF: 10 pages
Proc. SPIE 2966, Laser-Induced Damage in Optical Materials: 1996, (13 May 1997); doi: 10.1117/12.274292
Show Author Affiliations
Philippe F. Belleville, CEA/Limeil-Valenton (France)
Philippe M. Pegon, REOSC Optique (France)

Published in SPIE Proceedings Vol. 2966:
Laser-Induced Damage in Optical Materials: 1996
Harold E. Bennett; Arthur H. Guenther; Mark R. Kozlowski; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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