Study On The Holographic Solitons In Two-photon Photorefractive Crystal

The photorefractive spatial soliton is light beam that can propagate in a media as soliton with its intensity profile unchanged when the diffraction effect were balanced by the nonlinear effect. Because of the optical spatial soliton can be formed at very low incident intensity and response fast, for their wide potential application in lots of fields just like optical switch, integrating optics, optical communication and optical computation. Thus it became a hotspot the field of photorefractive nonlinear optics in recent years.The model of holographic soliton was advanced by Cohen in 2002, holographic solitons, the interference of two mutually coherent beams will induce a grating in refractive index and lead to simultaneous trapping of the two beams in a form of spatial solitons via cross-phase modulation. The diffraction effect of the light were balanced by nonlinear effect.Two-photon photorefractive spatial holographic soliton, came from the model of Castro-Camus. We research Two-photon photorefractive spatial holographic soliton in terms of theory and discuss the affect of the thermal.In this paper, foundations based on two wave mixing the theory, combine with Two-photon photorefractive model. We derive the analytic solutions of Two-photon photorefractive bright holographic soliton and Two-photon photorefractive dark holographic soliton. Then we made numerical simulations.Discuss the thermal affect on two-photon photorefractive spatial holographic soliton, and make use of the relationship between obscure radiation and the thermal to simulate the numerical solution of the Two-photon photorefractive spatial holographic soliton in different thermal.Finally. to research the theory of dissipative systems of two-photon photorefractive holographic solitons. Not only Based on the theoretical model of holographic solitons in dissipative system , but also include the model of Castro-Camus. We investigate the evolution equation in dissipative systems of holographic solitons,and show the solution of two-photon photorefractive bright and dark holographic solitons in dissipative systems. By use of numerical simulation, we discussed transmission characteristics of two-photon photorefractive bright and dark holographic solitons.