Filamentation of ultrashort light pulses in a liquid scattering medium |
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Authors: | V Jukna G Tamo?auskas G Valiulis M Aputis M Puida F Ivanauskas A Dubietis |
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Institution: | (1) Department of Quantum Electronics, Vilnius University, Saulėtekio Avenue 9, bldg. 3, 10222 Vilnius, Lithuania;(2) Faculty of Mathematics and Informatics, Vilnius University, Naugarduko 24, 03225 Vilnius, Lithuania |
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Abstract: | We have studied filamentation of 1-ps laser pulses in a scattering medium (aqueous suspension of 2-μm polystyrene microspheres)
and compared filamentation dynamics to that in pure water. Our results indicate that light scattering does not alter filamentation
dynamics in general, but rather results in farther position of the nonlinear focus, shorter filament length, and the development
of speckle structure in the peripheral part of the beam. The experimental observations are qualitatively reproduced by the
numerical model which accounts for diffraction, self-focusing, multiphoton absorption, and light scattering introduced through
a stochastic diffusion and diffraction term. |
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Keywords: | PACS" target="_blank">PACS 42 65 Jx 42 25 Bs |
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