Parametric Light–Dark Spatiotemporal Soliton

Abstract

The possibility of the appearance of a light–dark spatiotemporal soliton in the second-harmonic generation mode with the normal group velocity dispersion at the fundamental frequency in the absence of such a dispersion at the second harmonic frequency has been demonstrated theoretically. This object has the form of a dark two-color soliton with respect to time and coordinate in the direction of propagation and is light with respect to the transverse (spatial) coordinates.