Study of the spatial structure of a femtosecond laser beam in the filamentation domain under aberrational focusing in air
V.E. Prokopev, D.M. Lubenko, V.F. Losev
High Current Electronics Institute of the Siberian Branch of the RAS, Tomsk, Russia
Keywords: ультракороткие лазерные импульсы, филаментация, лазерная плазма, ultrashort laser pulses, filamentation, laser plasma
Abstract
The conditions for the occurrence of two pump beams propagating at an angle to each other, in which highly directed white SC beams are formed, are investigated and analyzed. The beams are formed due to aberration focusing of a femtosecond radiation pulse with a wavelength of 940 nm. It is shown that the mechanism of their formation is related to the diffraction of the pump beam on the filament plasma in the meridional focus region and Kerr self-focusing of radiation. The dynamics of development of these beams is demonstrated.
|
