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Estimation of the Characteristics of the Domain of Multiple Filamentation of Femtosecond Laser Pulses in Air Based on the Single Filamentation Model.

Estimation of the Characteristics of the Domain of Multiple Filamentation of Femtosecond Laser Pulses in Air Based on the Single Filamentation Model.

Authors :
Zemlyanov, A. A.
Geints, Yu. E.
Minina, O. V.
Source :
Atmospheric & Oceanic Optics; Mar2020, Vol. 33 Issue 2, p117-123, 7p
Publication Year :
2020

Abstract

Characteristics of the domain of multiple filamentation in air are estimated based on the numerical solution of a nonlinear Schrödinger equation in the single filamentation statement. The method of diffraction-ray tubes was used to describe the single filamentation of laser pulses. The efficiency of this method for interpreting experimental results and predicting effects is shown, which is important when planning experiments. The characteristic size of small-scale intensity inhomogeneities in the laser centimeter-radius beam profile, which induce a multiple filamentation of femtosecond pulses, is shown to be several millimeters. An increase in the initial laser beam radius during telescoping increases the sizes of the initial small-scale intensity inhomogeneities, and reduces their power. This leads to an increase in the distance to the start of filamentation. An increase in the initial beam power promotes the elongation of the filaments and increases their number. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
10248560
Volume :
33
Issue :
2
Database :
Complementary Index
Journal :
Atmospheric & Oceanic Optics
Publication Type :
Academic Journal
Accession number :
143095096
Full Text :
https://doi.org/10.1134/S1024856020020165