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Proceedings Paper

Photothermal characterization of optical laser components at 10.6 um
Author(s): Rene Krupka; Knut Jasper; Adolf Giesen
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Paper Abstract

The photothermal deflection technique (PDT) is applied to the optical and thermal characterization of optical components for high-power CO2 lasers. Besides bare copper and silicon substrates with different metallic and dielectric coatings, ZnSe optics were investigated at 10.6 micrometers using the laser-induced sample surface doformation to deflect a HeNe probe laser beam. The measured deflection signal is compared to laser-calorimetrically measured absorption whereas the surface deformation profile is used to investigate the thermal behavior of the different coating and substrate types. A finite-element-analysis (FEA) has also been performed, which allows the calculation of the surface temperature and the deformation profile for bare substrates and two additional coating layers with respect to the thermo-optical properties. These results are used as additional information for the sample characterization. The accuracy of the measurements of the thermal conductivity using the PDT technique is discussed in detail.

Paper Details

Date Published: 14 July 1995
PDF: 12 pages
Proc. SPIE 2428, Laser-Induced Damage in Optical Materials: 1994, (14 July 1995); doi: 10.1117/12.213741
Show Author Affiliations
Rene Krupka, Univ. Stuttgart (Germany)
Knut Jasper, Univ. Stuttgart (Germany)
Adolf Giesen, Univ. Stuttgart (Germany)


Published in SPIE Proceedings Vol. 2428:
Laser-Induced Damage in Optical Materials: 1994
Harold E. Bennett; Arthur H. Guenther; Mark R. Kozlowski; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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