Photothermal characterization of optical laser components at 10.6 um

Rene Krupka; Knut Jasper; Adolf Giesen

doi:10.1117/12.213741

14 July 1995 Photothermal characterization of optical laser components at 10.6 um

Rene Krupka, Knut Jasper, Adolf Giesen

Proceedings Volume 2428, Laser-Induced Damage in Optical Materials: 1994; (1995) https://doi.org/10.1117/12.213741
Event: Laser-Induced Damage in Optical Materials: 1994, 1994, Boulder, CO, United States

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.

Citation Download Citation

Rene Krupka, Knut Jasper, and Adolf Giesen "Photothermal characterization of optical laser components at 10.6 um", Proc. SPIE 2428, Laser-Induced Damage in Optical Materials: 1994, (14 July 1995); https://doi.org/10.1117/12.213741

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