New type gray spatial solitons in two-photon photorefractive media with both the linear and quadratic electro-optic effects

Abstract

The numerical solutions of gray spatial solitons supported by linear and quadratic electro-optic (EO) effects in two-photon photorefractive (PR) media are deduced. The characteristics of the gray spatial soliton, soliton pair and soliton family are investigated by numerical method. The full width at half maximum of the gray spatial soliton increases gradually with the increase of the grayness, but decreases gradually with the increase of the soliton optical intensity and external electric field. Also, every soliton component in the gray–gray soliton pair or soliton family has the same full width at half maximum.