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

2017 year, number 9

Global self-focusing and features of multiple filamentation of radiation of a subterawatt titanium-sapphire laser with centimeter output aperture along 150-m path

D.V. Apeksimov1, A.A. Zemlyanov1, A.N. Iglakova1, A.M. Kabanov1, O.I. Kuchinskaya1,2, G.G. Matvienko1,2, V.K. Oshlakov1, A.V. Petrov1
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2National Research Tomsk State University, 36, Lenin Avenue, Tomsk, 634050, Russia
Keywords: лазерное излучение, фемтосекундный импульс, самофокусировка, филаментация, постфиламентационный световой канал, воздух, laser radiation, femtosecond pulse, self-focusing, filamentation, postfilament light channels, focusing, air

Abstract

The formation and propagation of postfilamentation channels along a controllable path 150 m long are studied experimentally for collimated beams of different diameters. During multiple filamentation, a laser beam is compressed in global focus, after the passage of which its angular divergence is much greater than the divergence of postfilamentation channels generated during the filamentation. It is shown that postfilamentation channels have the intensity sufficient for the formation of multiple filamentation in optical elements after the end of the filamentation region at distances much longer than the filamentation length.