Self-focusing of ultraintense femtosecond optical vortices in air

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72 Scopus citations


Our experiments show that the critical power for self-focusing collapse of femtosecond vortex beams in air is significantly higher than that of a flattop beam and grows approximately linearly with the vortex order. With less than 10% of initial transverse intensity modulation of the beam profiles, the dominant mode of self-focusing collapse is the azimuthal breakup of the vortex rings into individual filaments, the number of which grows with the input beam power. The generated bottlelike distributions of plasma filaments rotate on propagation in the direction determined by the sense of vorticity.

Original languageEnglish (US)
Article number023901
JournalPhysical review letters
Issue number2
StatePublished - Jul 10 2013

ASJC Scopus subject areas

  • General Physics and Astronomy


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