Filamentation process of femtosecond laser pulse in air and associated phenomena

Vladimir E. Prokopev^abc, Dmitrii M. Lubenko<sup>abc

a</sup> Tomsk Polytechnic University, Tomsk, Russian Federation
^b Tomsk State University, Tomsk, Russian Federation
^c Institute of High Current Electronics SB RAS, Tomsk, Russian Federation

Abstract: The paper presents experimental studies of physical processes and conditions for generate high-directional white-light supercontinuum in visible range. It was shown that it occurs in filamentation area and postfilamentation channel under different spectral broadening mechanisms step by step. Experimentally shown that these phenomena can be realized under aberration focusing.

Keywords: femtosecond laser, laser filament, white-light supercontinuum, simulated Raman scattering, coherent anti-stokes Raman scattering, Four-wave mixing.

UDC: 535.232.233

Received: 29.10.2024
Received in revised form: 25.12.2024
Accepted: 04.02.2025

Language: English