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

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. (extreme light fields and their applications)
Authors:
;  [1] ; ; ;  [2]
  1. Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow (Russian Federation)
  2. Department of Physics, M.V. Lomonosov Moscow State University (Russian Federation)
Publication Date:
OSTI Identifier:
22395862
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 44; Journal Issue: 6; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; LASERS; OPTICAL DISPERSION; PLASMA; PULSES; SILICA