Photothermal characterization of optical laser components at 10.6 {mu}m
Conference
·
OSTI ID:552186
- Universitaet Stuttgart (Germany)
The photothermal deflection technique (PDT) is applied to the optical and thermal characterization of optical components for high power CO{sub 2}-lasers. Besides bare copper and silicon substrates with different metallic and dielectric coatings, ZnSe optics were investigated at 10.6 {mu}m using the laser induced sample surface deformation 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 behaviour 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 an additional information for the sample characterization. The accuracy of the measurements of the thermal conductivity using the PDT-technique is discussed in detail.
- Research Organization:
- International Society for Optical Engineering, Washington, DC (United States)
- OSTI ID:
- 552186
- Report Number(s):
- CONF-9410155--Vol.2428; CNN: Contract 13 N 5809
- Country of Publication:
- United States
- Language:
- English
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