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28 November 1983 Ultra-Violet Laser Damage In Aluminium Mirrors
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Proceedings Volume 0401, Thin Film Technologies I; (1983)
Event: 1983 International Technical Conference/Europe, 1983, Geneva, Switzerland
Laser induced damage threshold measurements at 248nm have been made on thin film deposited aluminium and dielectric overcoated aluminium mirrors. The damage threshold of the aluminium coatings was 0.2Jcm-2. Three dielectric overcoats have been considered, SiO, MgF2 and ThF4. The damage threshold of the SiO and MgF? overcoated aluminium mirrors was about 0.2 - 0.25Jcm-2. The ThF4 overcoated aluminium mirrors with reflectivities at 248nm comparable to the MgF2 and SiO overcoated aluminium mirrors had damage thresholds of 0.4Jcm-2. The influence of U.V. irradiation on the U.V. reflectivity and stoichiometry of the SiO overcoated aluminium mirrors was also investigated. Improvements in reflectivity of 20% at wavelengths below 250nm were observed.
© (1983) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stephen S. Wiseall and David C. Emmony "Ultra-Violet Laser Damage In Aluminium Mirrors", Proc. SPIE 0401, Thin Film Technologies I, (28 November 1983);

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