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Optical Engineering

Influence of polishing and cleaning on the laser-induced damage threshold of substrates and coatings at 1064 nm
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Paper Abstract

Laser-induced damage threshold (LIDT) results on silica substrates and coatings are presented for near-infrared applications. Different polishing and cleaning processes are evaluated. In particular, we investigate the influence of polishing and cleaning on the LIDT of silica substrates and optical coatings deposited by dual-ion-beam sputtering. Laser damage tests were performed at 1064 nm with a 5-ns-pulse Nd:YAG laser, and experiments were made on surfaces of optical components using a 12-μm-diameter focused beam. Accurate damage probability curves are plotted thanks to a reliable statistical measurement of laser damage. Use of a statistical model permits us to deduce the densities of laser damage precursors. We find a significant improvement of the LIDT of our coatings on choosing the appropriate cleaning and polishing process.

Paper Details

Date Published: 1 February 2007
PDF: 5 pages
Opt. Eng. 46(2) 023402 doi: 10.1117/1.2542122
Published in: Optical Engineering Volume 46, Issue 2
Show Author Affiliations
Helene T. Krol, Institut Fresnel (France)
Laurent Gallais, Institut Fresnel (France)
Mireille Commandré, Institut Fresnel (France)
Catherine M. Grèzes-Besset, CILAS Marseille (France)
Didier Torricini, CILAS Marseille (France)
Guy Lagier, CILAS Marseille (France)

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