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arXiv · 1511.06524

Regular "Breathing" of Single-Cycle Light Bullets in Mid-IR Filament

S. V. Chekalin·V. O. Kompanets·A. V. Kuznetzov·A. E. Dormidonov·S. A. Shlenov·V. P. Kandidov
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Abstract

Experimental and numerical studies of a temporal evolution of a light bullet formed in isotropic LiF by Mid IR femtosecond pulse (2500 to 3250 nm) of power, slightly exceeding the critical power for self-focusing, are presented. For the first time regular oscillations of the light bullet intensity during its propagation in a filament were registered by investigation of induced color centers in LiF. It was revealed that color centers in a single laser pulse filament have a strictly periodic structure with a length of separate sections about 30 mcm, which increases with a laser pulse wavelength decreasing. It was shown that the origin of light bullet modulation is a periodical change of the light field amplitude of an extremely compressed single cycle wave packet in a filament, due to the difference of the wave packet group velocity and the carrier wave phase velocity.

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S. V. Chekalin, V. O. Kompanets, A. V. Kuznetzov, A. E. Dormidonov, S. A. Shlenov, V. P. Kandidov. 2015-11-20. Regular "Breathing" of Single-Cycle Light Bullets in Mid-IR Filament. https://doi.org/10.1088/1612-2011%2F13%2F6%2F065401

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