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Proceedings Paper

Ionization-free filamentation in gases: soliton regime
Author(s): Lyubomir M. Kovachev; Kamen L. Kovachev
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Paper Abstract

Up to now the long range filaments are considered as a balance between Kerr focusing and defocusing by plasma generation in the nonlinear focus. However, the above explanation of filamentation in far-away zone finds considerable difficulties. There are basically two main characteristic which remain the same at these distances - the super broad spectrum and the width of the core, while the power in a stable filament drops to the critical value for self-focusing. With such power the plasma and higher-order Kerr terms are too small to prevent selffocusing. We suggest here a new mechanism for stable soliton pulse propagation in far-away zone, where the power of the laser pulse is a little above critical, and the pulse admits super-broad spectra.

Paper Details

Date Published: 15 November 2010
PDF: 9 pages
Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 775128 (15 November 2010); doi: 10.1117/12.879211
Show Author Affiliations
Lyubomir M. Kovachev, Institute of Electronics (Bulgaria)
Kamen L. Kovachev, Institute of Electronics (Bulgaria)

Published in SPIE Proceedings Vol. 7751:
XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Tanja Dreischuh; Petar A. Atanasov; Nikola V. Sabotinov, Editor(s)

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