26 June 2001 Some electromagnetic aspects of high-power laser interaction with transparent solids
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Proceedings Volume 4423, Nonresonant Laser-Matter Interaction (NLMI-10); (2001) https://doi.org/10.1117/12.431229
Event: Nonresonant Laser-Matter Interaction (NLMI-10), 2000, St. Petersburg, Russian Federation
There are considered two effects of nonlinear light propagation that can play an important role in initiating of laser-induced damage of transparent materials: self-induced variations of light polarization of focused laser beam and developing of field instability in non-absorbing micro inclusions. The effect of self-induced variations of light polarization is considered qualitatively for focused laser beam with arbitrary focal spot. Detailed numerical study of the effect is fulfilled for Gaussian beams of low order. It is shown that any initial light polarization turns into elliptic one with inhomogeneous distribution of polarization-ellips parameters. Developing of field instability in transparent micro inclusions is other considered nonlinear effect. It is shown that transparent micro inclusion can initiate local field increase accompanied by positive feedback resulting in further field increasing near the inclusion. If the electric field strength exceeds damage threshold during nonlinear evolution in the inclusion then developing of field instability result in damage of micro-inclusion before electric field reaches certain upper level determined by ionization processes.
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Vitali E. Gruzdev, Vitali E. Gruzdev, Mikhail N. Libenson, Mikhail N. Libenson, "Some electromagnetic aspects of high-power laser interaction with transparent solids", Proc. SPIE 4423, Nonresonant Laser-Matter Interaction (NLMI-10), (26 June 2001); doi: 10.1117/12.431229; https://doi.org/10.1117/12.431229

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