Abstract
Results of experiments on controlling the position and length of the filamentation region of femtosecond laser pulses along atmospheric paths 150 m long using different initial spatial focusing and defocusing are presented. The distribution of filaments over the filamentation region is found; the dependencies of the length of the filamentation region on the numerical aperture of a beam, its initial radius, and pulse power are derived. Emission spectra of targets made of different materials and placed in the filamentation region far from the radiation source are measured.
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Original Russian Text © D.V. Apeksimov, A.A. Zemlyanov, A.N. Iglakova, A.M. Kabanov, O.I. Kuchinskaya, G.G. Matvienko, V.K. Oshlakov, A.V. Petrov, 2016, published in Optika Atmosfery i Okeana.
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Apeksimov, D.V., Zemlyanov, A.A., Iglakova, A.N. et al. Multiple filamentation of laser beams of different diameters in air along a 150-meter path. Atmos Ocean Opt 29, 263–266 (2016). https://doi.org/10.1134/S1024856016030027
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DOI: https://doi.org/10.1134/S1024856016030027