Collapse arrest of two-color vector optical solitons in nonlocal nonlinear media

Abstract

In 2017, Sukhinin et al. investigated optical self-focusing that leads to collapse events for copropagating beams with different colors, which show that collapse events depend on the combined critical power of two beams as well as on the ratio of their individual powers [Phys. Rev. A 95, 031801 (2017)PLRAAN1050-294710.1103/PhysRevA.95.031801]. In this paper, we demonstrate that these collapse events of the two-color vector solitons can be eliminated in self-focusing media with nonlocal nonlinearity. We employ the variational approach to derive an approximate solution of the two-color vector solitons for fundamental, vortex, and mixed configurations. In the regime of strong nonlocality, we also show numerically the collapse arrest of the two-color vector solitons with the split-step Fourier transform method.