Publishing House SB RAS:

Publishing House SB RAS:

Address of the Publishing House SB RAS:
Morskoy pr. 2, 630090 Novosibirsk, Russia



Advanced Search

Atmospheric and Oceanic Optics

2013 year, number 1

Filamentation of high-power ulta-short laser radiation. Size factor of light beam

Yu.E. Geints, A.A. Zemlyanov
Keywords: ultrashort laser radiation, self-focusing, filamentation, light rays
Pages: 11-17

Abstract

The single (axial) filamentation regime of high-power collimated femtosecond laser radiation in the atmosphere is theoretically investigated. The effect of laser beam initial diameter on characteristics of a filament is analyzed. We consider three filament parameters: the coordinate of the filament beginning, its length and longitudinal continuity. We found that for the same initial beam power all the above characteristics of filaments show the dependence on the beam radius. As the main physical cause for this circumstance the diffraction interaction of various beam areas during the filamentation process is considered; the strength of this interaction increases as the beam widens.