S. V. Chekalin, A. E. Dokukina, E. O. Smetanina, V. O. Kompanets, V. P. Kandidov, “Plasma channels in a filament of a femtosecond laser pulse focused by an axicon”, Kvantovaya Elektronika, 2014, Volume 44, Number 6,Pages <nobr>570

This article is cited in 12 papers

Extreme light fields and their applications

Plasma channels in a filament of a femtosecond laser pulse focused by an axicon

S. V. Chekalin^a, A. E. Dokukina^b, E. O. Smetanina^b, V. O. Kompanets^a, V. P. Kandidov^b

^a Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow
^b M. V. Lomonosov Moscow State University, Faculty of Physics

Abstract: We report the results of experimental and numerical investigation of the influence of the wavefront curvature of femtosecond light focused by an axicon on the length and position of plasma channels in the filament under conditions of normal and anomalous group velocity dispersion in fused silica. It is shown that a change in the wavefront curvature by a value much greater than the longitudinal dimensions of the filament noticeably changes the geometry of the plasma channel position. The role of axicon focusing for ordering multiple filamentation is studied experimentally.

Keywords: filamentation, femtosecond pulses, anomalous dispersion, plasma channels, light bullets.

PACS: 42.65.Jx, 42.65.Re, 52.50.Jm

Received: 03.03.2014
Revised: 24.03.2014