Thermal stresses field-induced by continuous wave laser irradiation of optical components

Erik Duloisy; Jean DiJon

doi:10.1117/12.192159

4 November 1994 Thermal stresses field induced by continuous-wave laser irradiation of optical components

Erik Duloisy, Jean DiJon

Proceedings Volume 2253, Optical Interference Coatings; (1994) https://doi.org/10.1117/12.192159
Event: 1994 International Symposium on Optical Interference Coatings, 1994, Grenoble, France

Abstract

As a consequence of optical absorption, the temperature of an optical component submitted to high power laser flux increases. The temperature field is known to be non uniform, this leads to a distribution of stresses which may damage the system for temperatures well below the melting point. Assuming linear, isotropic and homogeneous materials, thermal strains and stresses have been calculated in a semi infinite medium under an axisymmetric steady state distribution of temperature. Taking into account interfacial stresses, analytical expressions for the stress fields have been developed for a film bonded to a substrate and submitted to a long time laser irradiation. Last, the results are discussed and compared to observed degradation steps.

Citation Download Citation

Erik Duloisy and Jean DiJon "Thermal stresses field induced by continuous-wave laser irradiation of optical components", Proc. SPIE 2253, Optical Interference Coatings, (4 November 1994); https://doi.org/10.1117/12.192159

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