Propagation of Incoherently Coupled Soliton Pairs in Photorefractive Crystals and their Self-Deflection

Propagation of incoherently solitonpairs in photorefractive crystals under steadystateconditions is studied. these soliton statescan be generated when the two mutuallyincoherent optical beams with the samepolarization and wavelength incident on thebiased photorefractive crystal. such solitonpairs can exist in bright-bright, dark-dark,gray-gray as well as in bright-dark types. in thispaper the stability against small perturbation inamplitude is investigated while they do notbreak up, and instead oscillates around thesoliton solution. results show that the brightbrightpairs can travel a longer distance withoutbroadening in comparison with the other types.finally the effect of self-deflection is simulatednumerically.