Soliton-like mode of (2D+1) spatiotemporal vortex pulse pairs in quadratic nonlinear crystal with transversal inhomogeneity

In this study we investigate the formation and propagation of pulse pairs in a quadratically nonlinear crystal containing two waveguides. The analysis focuses on how changes in parameters such as the relative positions of the waveguides, waveguide widths, and angle of entry influence the system. We observe that the pulse propagation mode varies with changes in the characteristics of the waveguides and the angle at which the pulses enter the medium.