Abstract

The possible generation and the properties of two-dimensional [(2 + 1)D] spatial solitons in bulk photorefractive crystals have been the object of growing interest during the last years.³ Owing to the screening of an external applied field in a (1 + 1)D model the electro-optic refractive index change Δn in such media takes the form of a saturable nonlinearity of the type Δn = n₀/(1 + I/I_sat)² The properties of (1 +1)D solitons in media with such type of saturable nonlinearity were studied in Refs. 2 and 3, However, in bulk photorefractive crystals the static electric field is related with the light intensity in a more complicated way with an anisotropic nonlocal response.⁴

© 1997 Optical Society of America