Dynamic spatial solitons

Abstract
A generalization of self-guided beams (spatial solitons) is discussed. Each beam is characterized by an axially uniform intensity profile whose polarization state changes with propagation. The soliton therefore has internal dynamics. It is composed of two orthogonally polarized modes of the linear waveguide induced by the dynamic soliton which, in general, do not exist as solitons independently. Our insight and exact analytical results for the threshold nonlinearity are found from the elementary physics of linear optical waveguides via a nonlinear self-consistency procedure.