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Proceedings Paper

Determination of the thermal conductivity of optical coatings using photothermal deflection technique and finite-element calculations
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Paper Abstract

Photothermal deflection measurements on optical components for 10.6 micrometer are presented. This technique is used to measure the photo induced deformation of the coated surface. The experimental results are compared to finite element calculations which allows the determination of the temperature and deformation profile at every point on the surface and within the sample. This comparison allows the determination of the thermal conductivity of the coatings. Although in the finite element calculations the coatings are approximated as only one single layer, we find a good agreement with the experimental results. The thermal conductivity of typical coated copper mirrors for 10.6 micrometer is found to be up to an order of magnitude lower than those of the corresponding bulk material.

Paper Details

Date Published: 20 November 1996
PDF: 10 pages
Proc. SPIE 2870, Third International Workshop on Laser Beam and Optics Characterization, (20 November 1996); doi: 10.1117/12.259940
Show Author Affiliations
Rene Krupka, Institut fuer Strahlwerkzeuge/Univ. Stuttgart (Germany)
Adolf Giesen, Institut fuer Strahlwerkzeuge/Univ. Stuttgart (Germany)

Published in SPIE Proceedings Vol. 2870:
Third International Workshop on Laser Beam and Optics Characterization
Michel Morin; Adolf Giesen, Editor(s)

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