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arXiv · 0805.3316

X and Y waves in the spatiotemporal Kerr dynamics of a self-guided light beam

Miguel A. Porras·Alberto Parola
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Abstract

The nonlinear stage of development of the spatiotemporal instability of the monochromatic Townes beam in a medium with self-focusing nonlinearity and normal dispersion is studied by analytical and numerical means. Small perturbations to the self-guided light beam are found to grow into two giant, splitting Y pulses featuring shock fronts on opposite sides. Each shocking pulse amplifies a co-propagating X wave, or dispersion- and diffraction-free linear wave mode of the medium, with super-broad spectrum.

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Miguel A. Porras, Alberto Parola. 2008-05-21. X and Y waves in the spatiotemporal Kerr dynamics of a self-guided light beam. https://doi.org/10.1016/j.optcom.2008.10.039

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