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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: G. I. Stegeman
  • Vol. 22, Iss. 12 — Dec. 1, 2005
  • pp: 2619–2627

Beam transformation and permanent modification in fused silica induced by femtosecond filaments

Viačeslav Kudriašov, Eugenijus Gaižauskas, and Valdas Sirutkaitis  »View Author Affiliations


JOSA B, Vol. 22, Issue 12, pp. 2619-2627 (2005)
http://dx.doi.org/10.1364/JOSAB.22.002619


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Abstract

Results of an investigation of lateral beam structure by propagating femtosecond pulses in fused silica are presented. Observed spatial transformations of the beam were closely related to the onset of continuum generation. Further beam propagation was in the form of an intense central spike (filament) and surrounding rings. Increasing power led to beam splitting and the formation of a regular structure of multiple filaments. The filament was responsible for the spontaneous formation of permanent modification inside the material. Experimental results are backed by numerical simulations that include self-guided channels of a permanent change of the refractive index in a bulk medium.

© 2005 Optical Society of America

OCIS Codes
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons
(320.2250) Ultrafast optics : Femtosecond phenomena

ToC Category:
Nonlinear Optics

Citation
Viaceslav Kudriasov, Eugenijus Gaizauskas, and Valdas Sirutkaitis, "Beam transformation and permanent modification in fused silica induced by femtosecond filaments," J. Opt. Soc. Am. B 22, 2619-2627 (2005)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-22-12-2619

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