Study of characteristics of intense light channels at postfilamentation stage of evolution of ultrashort laser radiation
Yu.E. Geints1, A.A. Zemlyanov1, A.A. Ionin2, D.V. Mokrousova2,3, L.V. Seleznev2, E.S. Sunchugasheva2,3
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2P.N. Lebedev Physical Institute of the Russian Academy of Science, 53 Leninskij Prospekt, 119991, Moscow, Russia
3Moscow Institute of Physics and Technology, per. Institutskiy, 9, Moscow Region, Dolgoprudnyiy, 141700, Russia
Keywords: ультракороткое лазерное излучение, самофокусировка, филаментация, постфиламентационное самоканалирование, ultrashort laser radiation, self-focusing, filamentation, postfilamentation self-channeling
Abstract
We present the results of our experimental and numerical studies of the multifilamentation of high-intensive pulse titanium-sapphire laser radiation (740 nm) in air. The postfilamentation stage of pulse propagation as specific spatially localized light structures is investigated. The angular divergence of postfilamentation channels is studied under different initial laser beam focusing. The threshold distance for the re-filamentation of postfilamentation channels in a glass plate is measured.
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