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Proceedings Paper

Room temperature processing of large-area sol gel mirrored coatings
Author(s): Philippe F. Belleville; Herve G. Floch
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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 KJ/500TW pulsed Nd:glass laser and which will be devoted to inertial confinement fusion research in France. With 240 laser beams and almost 10 000 m2 in coated area required, the proposed megajoule-class laser will be the largest laser system ever built in the world. The proposed laser conceptual design necessitates 44-cm by 44-cm by 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. After a sustained search effort, we have prepared mirrored coatings with up to 99 percent damage thresholds ranging 8-10 J/cm2 at 1053- nm wavelength and with 3-ns pulse duration were achieved. Mirrors with good coating uniformity and weak edge-effect could be produced by dip-coating and laminar-flow coating at room temperature and atmospheric pressure. To satisfy the coating demand, coating equipments and a 1000-m2 sol-gel coating production plant are planned to be built at REOSC- Group SFIM company in order to start producing within schedule and cost goal.

Paper Details

Date Published: 19 August 1996
PDF: 1 pages
Proc. SPIE 2775, Specification, Production, and Testing of Optical Components and Systems, (19 August 1996); doi: 10.1117/12.246780
Show Author Affiliations
Philippe F. Belleville, CEA/Ctr. d'Etudes de Limeil-Valenton (France)
Herve G. Floch, CEA/Ctr. d'Etudes de Limeil-Valenton (France)

Published in SPIE Proceedings Vol. 2775:
Specification, Production, and Testing of Optical Components and Systems
Anthony E. Gee; Jean-Francois Houee, Editor(s)

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