4 December 2012 Laser-induced surface damage density measurements with small and large beams: the representativeness light
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Abstract
The comparison of laser-damage-densities (LDD) measurements performed with pulsed laser radiation at different facilities is tricky due to numerous parameters involved. These parameters, namely pulse length, profile, and frequency, beam size, as well as method of damage detection have significant impact on final result. Previous methods and suitable data processing developed to determine with accuracy and repeatability the LDD allow us to achieve this comparison, e.g. the reproducibility. Since such studies are related to the life-time predictions for large aperture optical materials used in high-power lasers, the question that is addressed in this presentation concerns the representativeness of such results as regards of laser damage with large and real beams. Tests with large beams of centimetric size on a high power laser facility have beam performed according to a parametric study and are compared to small beam laboratory tests. More the emphasis is on the optical component thickness that may affect both damage initiation and damage growth due to the occurrence of non-linear effects that intensify damage issue.
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L. Lamaignère, L. Lamaignère, G. Dupuy, G. Dupuy, T. Donval, T. Donval, } "Laser-induced surface damage density measurements with small and large beams: the representativeness light", Proc. SPIE 8530, Laser-Induced Damage in Optical Materials: 2012, 85301F (4 December 2012); doi: 10.1117/12.976840; https://doi.org/10.1117/12.976840
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