skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Peculiarities of filamentation of sharply focused ultrashort laser pulses in air

Abstract

Peculiarities of the self-focusing and filamentation of high-power femtosecond laser pulses in air have been experimentally and theoretically studied under conditions of broad variation of the beam focusing parameter. The influence of the numerical aperture (NA) of the initial radiation focusing on the main characteristics of laser-induced plasma columns (characteristic transverse size, length, and concentration of free electrons) is considered. It is established that, for a rigid (NA > 0.05) initial laser beam focusing, the transverse size of the plasma channel ceases to decrease at a level of R{sub pl} {approx} 2-4 {mu}m as a result of strong refraction of radiation on the plasma formed at the focal waist, which prevents further contraction of the laser beam due to its focusing and self-focusing.

Authors:
;  [1]; ; ; ;  [2]
  1. Russian Academy of Sciences, Zuev Institute of Atmospheric Optics, Siberian Branch (Russian Federation)
  2. Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation)
Publication Date:
OSTI Identifier:
21443352
Resource Type:
Journal Article
Journal Name:
Journal of Experimental and Theoretical Physics
Additional Journal Information:
Journal Volume: 111; Journal Issue: 5; Other Information: DOI: 10.1134/S1063776110110038; Copyright (c) 2010 Pleiades Publishing, Ltd.; Journal ID: ISSN 1063-7761
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 74 ATOMIC AND MOLECULAR PHYSICS; AIR; BEAM-PLASMA SYSTEMS; ELECTRONS; FOCUSING; LASER RADIATION; LASER-PRODUCED PLASMA; PLASMA FILAMENT; PULSES; REFRACTION; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; FERMIONS; FLUIDS; GASES; LEPTONS; PLASMA; RADIATIONS

Citation Formats

Geints, Yu E, Zemlyanov, A A, Ionin, A A, Kudryashov, S I, Seleznev, L. V., E-mail: seleznev@sci.lebedev.ru, Sinitsyn, D V, and Sunchugasheva, E S. Peculiarities of filamentation of sharply focused ultrashort laser pulses in air. United States: N. p., 2010. Web. doi:10.1134/S1063776110110038.
Geints, Yu E, Zemlyanov, A A, Ionin, A A, Kudryashov, S I, Seleznev, L. V., E-mail: seleznev@sci.lebedev.ru, Sinitsyn, D V, & Sunchugasheva, E S. Peculiarities of filamentation of sharply focused ultrashort laser pulses in air. United States. https://doi.org/10.1134/S1063776110110038
Geints, Yu E, Zemlyanov, A A, Ionin, A A, Kudryashov, S I, Seleznev, L. V., E-mail: seleznev@sci.lebedev.ru, Sinitsyn, D V, and Sunchugasheva, E S. 2010. "Peculiarities of filamentation of sharply focused ultrashort laser pulses in air". United States. https://doi.org/10.1134/S1063776110110038.
@article{osti_21443352,
title = {Peculiarities of filamentation of sharply focused ultrashort laser pulses in air},
author = {Geints, Yu E and Zemlyanov, A A and Ionin, A A and Kudryashov, S I and Seleznev, L. V., E-mail: seleznev@sci.lebedev.ru and Sinitsyn, D V and Sunchugasheva, E S},
abstractNote = {Peculiarities of the self-focusing and filamentation of high-power femtosecond laser pulses in air have been experimentally and theoretically studied under conditions of broad variation of the beam focusing parameter. The influence of the numerical aperture (NA) of the initial radiation focusing on the main characteristics of laser-induced plasma columns (characteristic transverse size, length, and concentration of free electrons) is considered. It is established that, for a rigid (NA > 0.05) initial laser beam focusing, the transverse size of the plasma channel ceases to decrease at a level of R{sub pl} {approx} 2-4 {mu}m as a result of strong refraction of radiation on the plasma formed at the focal waist, which prevents further contraction of the laser beam due to its focusing and self-focusing.},
doi = {10.1134/S1063776110110038},
url = {https://www.osti.gov/biblio/21443352}, journal = {Journal of Experimental and Theoretical Physics},
issn = {1063-7761},
number = 5,
volume = 111,
place = {United States},
year = {Mon Nov 15 00:00:00 EST 2010},
month = {Mon Nov 15 00:00:00 EST 2010}
}