Large-area sol-gel highly reflective coatings processed by the dipping technique

Philippe F. Belleville; Philippe M. Pegon

doi:10.1117/12.274292

13 May 1997 Large-area sol-gel highly reflective coatings processed by the dipping technique

Philippe F. Belleville, Philippe M. Pegon

Proceedings Volume 2966, Laser-Induced Damage in Optical Materials: 1996; (1997) https://doi.org/10.1117/12.274292
Event: Laser-Induced Damage in Optical Materials: 1996, 1996, Boulder, CO, United States

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.

Citation Download Citation

Philippe F. Belleville and Philippe M. Pegon "Large-area sol-gel highly reflective coatings processed by the dipping technique", Proc. SPIE 2966, Laser-Induced Damage in Optical Materials: 1996, (13 May 1997); https://doi.org/10.1117/12.274292

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