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This article is cited in 7 scientific papers (total in 7 papers)
Nonlinear optical phenomena
Post-filamentation propagation of high-power laser pulses in air in the regime of narrowly focused light channels
Yu. E. Geintsa, A. A. Zemlyanova, A. A. Ioninb, D. V. Mokrousovabc, L. V. Seleznevb, D. V. Sinitsynb, E. S. Sunchugashevabc a Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Science, Tomsk
b P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow
c Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow region
Abstract:
We report the results of experimental and theoretical studies of the post-filamentation stage of nonlinear propagation of high-power pulsed radiation from a Ti : sapphire laser in air. We have for the first time obtained the experimental dependences of the angular divergence of specific spatially localised high-intensity light structures that are observed in the beam after its multiple filamentation (post-filamentation of channels) when varying the initial focusing of laser radiation and its energy. It is found that the angular divergence of the post-filamentation channels decreases with increasing pulse energy and reducing beam numerical aperture. The experimental dependences are qualitatively interpreted based on the diffraction model of the Bessel–Gaussian beam.
Keywords:
ultrashort laser radiation, self-focusing, filamentation, post-filament channelling.
Received: 09.06.2016 Revised: 30.09.2016
Citation:
Yu. E. Geints, A. A. Zemlyanov, A. A. Ionin, D. V. Mokrousova, L. V. Seleznev, D. V. Sinitsyn, E. S. Sunchugasheva, “Post-filamentation propagation of high-power laser pulses in air in the regime of narrowly focused light channels”, Kvantovaya Elektronika, 46:11 (2016), 1009–1014 [Quantum Electron., 46:11 (2016), 1009–1014]
Linking options:
https://www.mathnet.ru/eng/qe16494 https://www.mathnet.ru/eng/qe/v46/i11/p1009
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