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This article is cited in 6 scientific papers (total in 6 papers)
Extreme light fields and their applications
Experimental study of filamentation of high-power ultrashort laser pulses with initial angular divergence in air
Yu. E. Geintsa, A. A. Zemlyanova, A. M. Kabanova, G. G. Matvienkoa, A. N. Stepanovb a Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Science, Tomsk
b Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod
Abstract:
Experimental study of the nonlinear propagation of near-IR gigawatt femtosecond laser pulses in air in the self-focusing and filamentation regimes have been performed in open air and in laboratory. The influence of the initial geometric divergence (both positive and negative) of the laser beam with an irregular intensity profile on the transverse light energy distribution at the end of the path is studied. It is shown experimentally that the displacement of the filamentation region due to geometric focusing or defocusing, makes it possible to control the number and spatial location of light energy density peaks in the receiving plane. The conditions under which a light filament can be reconstructed after the beam transmission through a linear focal waist are determined. A semi-empirical threshold relation is obtained for the beam focusing force and the beam power, when light beam undergoes filamentation behind the geometric focus of the optical system.
Keywords:
filamentation of femtosecond laser beam, angular divergence, multiple filaments.
Received: 24.12.2012 Revised: 18.01.2013
Citation:
Yu. E. Geints, A. A. Zemlyanov, A. M. Kabanov, G. G. Matvienko, A. N. Stepanov, “Experimental study of filamentation of high-power ultrashort laser pulses with initial angular divergence in air”, Kvantovaya Elektronika, 43:4 (2013), 350–355 [Quantum Electron., 43:4 (2013), 350–355]
Linking options:
https://www.mathnet.ru/eng/qe15112 https://www.mathnet.ru/eng/qe/v43/i4/p350
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