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Filamentation of femtosecond Ti:Sapphire laser pulses at the first and second harmonics in liquid media

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Abstract

The experimental results on transformation of the spectral and spatial characteristics of femtosecond Ti:Sapphire-laser pulses with wavelengths of 800 and 400 nm during filamentation in liquid media are presented. It is shown that spectral broadening of a laser pulse at both harmonics at the expense of phase self-modulation in a medium with cubic nonlinearity depends on pulse power and beam diameter. Emission with a maximum at 464 nm is observed during filamentation of the pulses with a wavelength of 400 nm in distilled water, which corresponds to stimulated Raman scattering of the water. Fluorescence of dissolved organic matter is observed in sea water.

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Correspondence to D. V. Apeksimov.

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Original Russian Text © D.V. Apeksimov, O.A. Bukin, E.E. Bykova, S.S. Golik, A.A. Zemlyanov, A.A. Ilyin, A.M. Kabanov, G.G. Matvienko, V.K. Oshlakov, A.V. Petrov, E.B. Sokolova, 2013, published in Optica Atmosfery i Okeana.

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Apeksimov, D.V., Bukin, O.A., Bykova, E.E. et al. Filamentation of femtosecond Ti:Sapphire laser pulses at the first and second harmonics in liquid media. Atmos Ocean Opt 27, 361–365 (2014). https://doi.org/10.1134/S1024856014050042

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  • DOI: https://doi.org/10.1134/S1024856014050042

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