Spatial and temporal dynamics of light attenuation and transmission by plasmas induced in liquids by nanosecond Nd:YAG laser pulses |
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| Authors: | F. Docchio |
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| Affiliation: | (1) Dipartimento di Automazione Industriale, Facoltà di Ingegneria, Università degli Studi di Brescia, Via D. Valotti, 9, 25060 Mompiano, Brescia, Italia;(2) Centro di Elettronica Quantistica e Strumentazione Elettronica del CNR Istituto di Fisica, Politecnico di Milano, P.za L. da Vinci, 32, 20133 Milano, Italia |
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| Abstract: | Summary The analysis of the spatial and temporal dynamics of plasmas induced in liquids by nanosecond laser pulses, based on a model of moving breakdown combined with a model of distributed shielding, is herein presented. Time- and space-resolved characteristics of energy absorption and transmission are evaluated with the aid of the two models, and compared to experimental findings available in the literature. In particular, energy absorbed per unit length and volume of the plasma column, time-resolved transmission, and energy input-output characteristics of the plasma, are considered. The dependence of the plasma attenuation of the focusing geometry is also discussed. The relevance of this analysis in relation to laser photodisruption is finally outlined. |
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| Keywords: | Emission absorption and scattering of visible and infrared radiation |
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