Abstract

Theoretical models of a soliton propagation of beams and pulses in a cubic nonlinear medium assume either a balance between the lateral collimation due to the cubic nonlinearity and the diffraction spreading or the equilibrium between the longitudinal action of the cubic nonlinearity and the dispersion effects.¹ In this report a soliton pulse model is considered, with taking into account both the lateral and longitudinal (with respect to the initial wave vector) effects. Such a situation takes place when a two-dimensional wave packet with non-coincident amplitude and phase fronts falls on the interface. The wave packet with the above property, which is often referred to as the packet with tilted wave fronts² is called hereafter inhomogeneous (or skew) pulse. Skew pulses can be produced by means of the reflection from the diffraction grating or by translational scanning two-dimensional beams.

© 1994 IEEE