A new type of long-lived solitary structures for paraxial optics with two circular polarizations of light in a homogeneous defocusing Kerr medium with an anomalous group velocity dispersion has been revealed numerically in the coupled nonlinear Schrödinger equations. A found hybrid three-dimensional soliton is a vortex ring against the background of a plane wave in one of the components, and the core of the vortex is filled with another component nonuniformly in azimuth angle. The existence of such quasistationary structures with a reduced symmetry in a certain parametric region is due to the saturation of the so-called sausage instability caused by the effective surface tension of a domain wall between two polarizations.
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This work was supported by the Ministry of Science and Higher Education of the Russian Federation (state assignment no. 0029-2021-0003).
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Ruban, V.P. Nonuniformly Filled Vortex Rings in Nonlinear Optics. Jetp Lett. 117, 583–587 (2023). https://doi.org/10.1134/S0021364023600817
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DOI: https://doi.org/10.1134/S0021364023600817