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Article Dans Une Revue Optics Letters Année : 2022

Femtosecond filamentation of optical vortices for the generation of optical air waveguides

Benoît Mahieu
André Mysyrowicz
Aurélien Houard

Résumé

We study the filamentation in air of multi-millijoule optical vortices and compare them with the classical filamentation regime. The femtosecond vortex beam generates multiple plasma filaments organized in a cylindrical geometry. This plasma configuration evolves into a meter-scale tubular neutral gas column that can be used as a waveguide for nanosecond laser pulses at 532 nm. It appears that optical vortices produce a more uniform heating along the propagation axis, when compared with Gaussian or super-Gaussian beams, and that the resulting low-density channel is poorly sensitive to the laser input power thanks to the combination of filamentation intensity clamping and phase vorticity.
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Dates et versions

hal-03793853 , version 1 (02-10-2022)

Identifiants

Citer

Silin Fu, Benoît Mahieu, André Mysyrowicz, Aurélien Houard. Femtosecond filamentation of optical vortices for the generation of optical air waveguides. Optics Letters, 2022, 47 (19), pp.5228. ⟨10.1364/OL.472143⟩. ⟨hal-03793853⟩
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