Evolution and stability of spatial solitons in a photorefractive two-wave mixing system

The dynamical evolution and stability ofbright dissipative holographic solitons in biased photorefractive materialsin which the self-trapping beam obtains a gain from the pump beam via two-wavemixing has been investigated numerically. Results show that these solitons are stable relative to smallperturbations. Adjusting some system parameters, such as the bias field andthe angle between beams, can easily control the generation of such solitons.Potential applications in optical switches or repeaters are discussed.