This article is cited in 22 papers

Special issue 'Extreme light fields and their interaction with matter'

Suppression of small-scale self-focusing of high-power laser beams due to their self-filtration during propagation in free space

V. N. Ginzburg, A. A. Kochetkov, A. K. Potemkin, E. A. Khazanov

Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod

Abstract: It has been experimentally confirmed that self-cleaning of a laser beam from spatial noise during propagation in free space makes it possible to suppress efficiently the self-focusing instability without applying spatial filters. Measurements of the instability increment by two independent methods have demonstrated quantitative agreement with theory and high efficiency of small-scale selffocusing suppression. This opens new possibilities for using optical elements operating in transmission (frequency doublers, phase plates, beam splitters, polarisers, etc.) in beams with intensities on the order of a few TW cm^-2.

Keywords: small-scale self-focusing, high-power femtosecond laser beams, self-filtration.

Received: 16.02.2018

 English version: Quantum Electronics, 2018, 48:4, 325–331

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