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Multiple filamentation of laser pulses in the glass D. V. Apeksimov, O. A. Bukin, S. S. Golik [et.al.]

Contributor(s): Apeksimov, Dmitrij V | Golik, Sergej S | Zemlyanov, Alexander A | Iglakova, Anastasiya N | Kabanov, Andrej M | Kuchinskaya, Olesya I | Matvienko, Gennadij G | Oshlakov, Viktor K | Petrov, Aleksej V | Bukin, Oleg A | Sokolova, Ekaterina BMaterial type: ArticleArticleSubject(s): лазерное излучение | фемтосекундный импульс | множественная филаментацияGenre/Form: статьи в журналахOnline resources: Click here to access online In: Proceedings of SPIE Vol. 9680 : 21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics, June 22-26, 2015, Tomsk, Russian Federation. P. 96801A-1-96801A-4Abstract: Results are presented of experiments on investigation of the spatial characteristics of multi-filamentation region of giga- and terawatt pulses of a Ti:sapphire laser in a glass. Dependences are obtained of the coordinate of the beginning of filamentation region, number of filaments, their distribution along the laser beam axis, and length of filaments on the pulse power. It is shown that with increasing radiation power, the number of filaments in the multi-filamentation region decreases, whereas the filament diameter has a quasiconstant value for all powers realized in the experiments. It is shown that as a certain power of the laser pulse with Gauss energy density distribution is reached, the filamentation region acquires the shape of a hollow cone with apex directed toward the radiation source.
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Results are presented of experiments on investigation of the spatial characteristics of multi-filamentation region of giga- and terawatt pulses of a Ti:sapphire laser in a glass. Dependences are obtained of the coordinate of the beginning of filamentation region, number of filaments, their distribution along the laser beam axis, and length of filaments on the pulse power. It is shown that with increasing radiation power, the number of filaments in the multi-filamentation region decreases, whereas the filament diameter has a quasiconstant value for all powers realized in the experiments. It is shown that as a certain power of the laser pulse with Gauss energy density distribution is reached, the filamentation region acquires the shape of a hollow cone with apex directed toward the radiation source.

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