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Proceedings Paper

Studies of femtosecond pulse filamentation in glasses
Author(s): Saulius Juodkazis; Vygantas Mizeikis; Eugenijus Gaižauskas; Egidijus Vanagas; Vygandas Jarutis; Hiroaki Misawa
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Paper Abstract

Self-focusing and filamentation of nearly-Gaussian femtosecond laser pulses propagating in photosensitive silicate glass was investigated. The filamentation was visualized by the precipitation of NaF nano-crystallites along the beam pass after post-exposure treatment of photosensitive glass, which provides a direct proof that ionization of silicate matrix takes place along the filament propagation lines. Theoretical model of the multi-filamentation based on the propagation of a Gaussian beam with elliptical transverse intensity profile modulated by a spatial noise in a medium with multi-photon absorption is proposed. Self-action of the femtosecond Gaussian-Bessel pulses in borosilicate glass was observed at high fluence. This model reproduces qualitatively the dotted damage lines observed after the beam propagation in borosilicate glass.

Paper Details

Date Published: 9 June 2006
PDF: 8 pages
Proc. SPIE 6053, International Conference on Lasers, Applications, and Technologies 2005: High-Power Lasers and Applications, 60530R (9 June 2006); doi: 10.1117/12.660334
Show Author Affiliations
Saulius Juodkazis, Hokkaido Univ. (Japan)
Vygantas Mizeikis, Hokkaido Univ. (Japan)
Eugenijus Gaižauskas, Vilnius Univ. (Lithuania)
Egidijus Vanagas, Laser Systems Inc. (Japan)
Vygandas Jarutis, Hokkaido Univ. (Japan)
Hiroaki Misawa, Hokkaido Univ. (Japan)


Published in SPIE Proceedings Vol. 6053:
International Conference on Lasers, Applications, and Technologies 2005: High-Power Lasers and Applications
Willy L. Bohn; Vladimir S. Golubev; Andrey A. Ionin; Vladislav Ya. Panchenko, Editor(s)

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