Studies of femtosecond pulse filamentation in glasses

Saulius Juodkazis; Vygantas Mizeikis; Eugenijus Gaižauskas; Egidijus Vanagas; Vygandas Jarutis; Hiroaki Misawa

doi:10.1117/12.660334

9 June 2006 Studies of femtosecond pulse filamentation in glasses

Saulius Juodkazis, Vygantas Mizeikis, Eugenijus Gaižauskas, Egidijus Vanagas, Vygandas Jarutis, Hiroaki Misawa

Proceedings Volume 6053, International Conference on Lasers, Applications, and Technologies 2005: High-Power Lasers and Applications; 60530R (2006) https://doi.org/10.1117/12.660334
Event: International Conference on Lasers, Applications, and Technologies 2005, 2005, St. Petersburg, Russian Federation

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.

Citation Download Citation

Saulius Juodkazis, Vygantas Mizeikis, Eugenijus Gaižauskas, Egidijus Vanagas, Vygandas Jarutis, and Hiroaki Misawa "Studies of femtosecond pulse filamentation in glasses", Proc. SPIE 6053, International Conference on Lasers, Applications, and Technologies 2005: High-Power Lasers and Applications, 60530R (9 June 2006); https://doi.org/10.1117/12.660334

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