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Proceedings Paper

Influence of the nonlinear losses on the modifications induced by femtosecond filaments in fused silica
Author(s): V. Kudriasov; A. Savickas; E. Gaizauskas; V. Sirutkaitis
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Paper Abstract

Nonlinear losses experienced by the self-focusing femtosecond pulse is shown to have an important effect on the refractive index modifications in fused silica. The region of the maximum induced change is found to coincide with that of the maximum nonlinear losses of the pulse. It is found as well that material densification and the formation of color centers both contribute to the index change in that zone. Experimental results are supported by numerical simulations using model that takes into account accumulation of the permanent refractive index changes and their influence back on the pulse. Both the color center- and compaction-induced changes cause the modification to develop into a waveguide and lead to the narrowing of supercontinuum spectra.

Paper Details

Date Published: 30 December 2008
PDF: 10 pages
Proc. SPIE 7132, Laser-Induced Damage in Optical Materials: 2008, 713204 (30 December 2008); doi: 10.1117/12.804418
Show Author Affiliations
V. Kudriasov, Vilnius Univ. (Lithuania)
A. Savickas, Vilnius Univ. (Lithuania)
E. Gaizauskas, Vilnius Univ. (Lithuania)
V. Sirutkaitis, Vilnius Univ. (Lithuania)

Published in SPIE Proceedings Vol. 7132:
Laser-Induced Damage in Optical Materials: 2008
Gregory J. Exarhos; Detlev Ristau; M. J. Soileau; Christopher J. Stolz, Editor(s)

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