7 February 2006 Simple model of laser damage initiation and conditioning in frequency conversion crystals
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Abstract
Laser conditioning, i.e. pre-exposure to less than damaging laser fluence, has been shown to improve the damage resistance of KDP/DKDP frequency conversion crystals. We have extended our damage model, small absorbing precursors with a distribution of sizes, to describe various damage related properties such as damage density and effects of laser conditioning in crystals. The model assumes the rate limiting process for both initiation and conditioning depends on temperature and that separate threshold temperatures exist for either conditioning or damage initiation to occur. This is reasonable in KDP/DKDP since the melting temperature is far below the temperatures associated with plasma formation and damage events. This model is capable of accounting for some recently observed damage-conditioning behaviors.
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M.D. Feit, M.D. Feit, A.M. Rubenchik, A.M. Rubenchik, J.B. Trenholme, J.B. Trenholme, } "Simple model of laser damage initiation and conditioning in frequency conversion crystals", Proc. SPIE 5991, Laser-Induced Damage in Optical Materials: 2005, 59910W (7 February 2006); doi: 10.1117/12.638830; https://doi.org/10.1117/12.638830
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