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Proceedings Paper

Large-area sol-gel optical coatings for the Megajoule Laser prototype
Author(s): Philippe M. Pegon; Chantal V. Germain; Yannick R. Rorato; Philippe F. Belleville; Eric Lavastre
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Paper Abstract

In the field of thin film coatings, sol-gel (SG) process is an alternative to the conventional Physical Vapor Deposition (PVD) techniques. Sol-gel process is particularly competitive on large-area or fragile substates by taking advantage of various liquid phase deposition techniques performed at room temperature and atmospheric pressure, coupled with the versatility of organo-metallic chemistry. Developed by the French Commission for Atomic Energy (CEA) since 1985 for its former high-power lasers generation, optimized sol-gel coatings proved also very resistant to laser energy. In 1998, THALES Angenieux (TAGX) was selected by CEA to provide all the sol-gel coatings dedicated to the French Laser MegaJoule (LMJ) prototype, named Ligne d'Integration Laser (LIL). In cooperation with Saint-Etienne Pole Optique et Vision (POV), TAGX initiated the building of a sol-gel technological platform (SGPF) aimed at demonstrating the feasibility of production of optical and functional coatings on large area substrates. A technology transfer was performed by CEA (Le Ripault) to TAGX focusing on the manufacture mainly of single-layer antireflective coatings (SLAR), but also of multi-layer AR-coatings and of multi-layered highly reflective (HR)-coatings. Since beginning of 2001 and using SGPF equipments, TAGX successfully coated within specificaitons and schedule most of the 300 optics required for LIL activation. After this 2 years 1/2 production campaign in pre-industrial conditions, we can now analyse the advantages of each deposition technique used, the repeatability of the several processes, and the performance of the various coatings.

Paper Details

Date Published: 25 February 2004
PDF: 12 pages
Proc. SPIE 5250, Advances in Optical Thin Films, (25 February 2004); doi: 10.1117/12.512982
Show Author Affiliations
Philippe M. Pegon, THALES Angenieux SA (France)
Chantal V. Germain, THALES Angenieux SA (France)
Yannick R. Rorato, THALES Angenieux SA (France)
Philippe F. Belleville, CEA Le Ripault (France)
Eric Lavastre, CEA-CESTA (France)


Published in SPIE Proceedings Vol. 5250:
Advances in Optical Thin Films
Claude Amra; Norbert Kaiser; H. Angus Macleod, Editor(s)

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