Room temperature processing of large-area sol gel mirrored coatings

Philippe F. Belleville; Herve G. Floch

doi:10.1117/12.246780

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19 August 1996 Room temperature processing of large-area sol-gel mirrored coatings (Abstract Only)

Philippe F. Belleville, Herve G. Floch

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Proceedings Volume 2775, Specification, Production, and Testing of Optical Components and Systems; (1996) https://doi.org/10.1117/12.246780
Event: Optical Instrumentation and Systems Design, 1996, Glasgow, United Kingdom

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.

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Philippe F. Belleville and Herve G. Floch "Room temperature processing of large-area sol-gel mirrored coatings (Abstract Only)", Proc. SPIE 2775, Specification, Production, and Testing of Optical Components and Systems, (19 August 1996); https://doi.org/10.1117/12.246780

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