Applied Physics B

, 104:561

Vortices in ultrashort laser pulses


DOI: 10.1007/s00340-011-4649-2

Cite this article as:
Hansinger, P., Dreischuh, A. & Paulus, G.G. Appl. Phys. B (2011) 104: 561. doi:10.1007/s00340-011-4649-2


The propagation of optical vortices nested in broadband femtosecond laser beams was studied both numerically and experimentally. Based on the nonlinear Schrödinger equation, the dynamics of different multiple-vortex configurations with varying topological charge were modelled in self-focussing and self-defocussing Kerr media. We find a similar behavior in both cases regarding the vortex–vortex interaction. However, the collapsing background beam alters the propagation for a positive nonlinearity. Regimes of regular and possibly stable multiple filamentation were identified this way. Experiments include measurements on pairs of filaments generated in a vortex beam on an astigmatic Gaussian background with argon gas as the nonlinear medium. Spectral broadening of these filaments leads to a supercontinuum which spans from the visible range into the infrared. Recompression yields <19 fs pulses. Further optimization may lead to much better recompression.

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Institut für Optik und QuantenelektronikFriedrich-Schiller-Universität JenaJenaGermany
  2. 2.Department of Quantum ElectronicsSofia UniversitySofiaBulgaria
  3. 3.Helmholtz-Institut JenaJenaGermany

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