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arXiv · 1010.3664

Azimuthons in weakly nonlinear waveguides of different symmetries

Yiqi Zhang·Stefan Skupin·Fabian Maucher·Arpa Galestian Pour·Keqing Lu·Wieslaw Królikowski
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Abstract

We show that weakly guiding nonlinear waveguides support stable propagation of rotating spatial solitons (azimuthons). We investigate the role of waveguide symmetry on the soliton rotation. We find that azimuthons in circular waveguides always rotate rigidly during propagation and the analytically predicted rotation frequency is in excellent agreement with numerical simulations. On the other hand, azimuthons in square waveguides may experience spatial deformation during propagation. Moreover, we show that there is a critical value for the modulation depth of azimuthons above which solitons just wobble back and forth, and below which they rotate continuously. We explain these dynamics using the concept of energy difference between different orientations of the azimuthon.

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Yiqi Zhang, Stefan Skupin, Fabian Maucher, Arpa Galestian Pour, Keqing Lu, Wieslaw Królikowski. 2010-10-18. Azimuthons in weakly nonlinear waveguides of different symmetries. https://doi.org/10.1364/oe.18.027846

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