A Method Of Photorefractive Diffusion-drift Mechanism For Numerical Analysis Of Surface Waves

Nonlinear optics is to study the role of media in a strong coherent light and its effect of nonlinear phenomena and its application. It should be said that after the laser had been invented, the nonlinear optics has developed into such an important subject. Photo-induced refractive index change effect, called photorefractive effect for short, it refers to the electro-optic refractive index modulation in space or non-uniform light intensity of the radiation intensity, the occurrence of corresponding changes. Photorefractive nonlinear optics research in the field is developing into two ways, first, high quality development of photorefractive materials, another approach is to study the photorefractive crystal and its nonlinear characteristics in optical storage, optical information processing and optical computer application. And also optical soliton communication, optical switching.At present. The research of photorefractive nonlinear crystal in demestic and abroad has focused on:the nonlinear surface wave under diffusion mechanism and diffusion-drift mechanism of nonlinear surface wave in the photorefractive crystal. In this article the further study is base on the mechanism of photorefractive surface waves. First, the analyze of formation mechanism of the photorefractive nonlinear surface wave, from the experiments we can verify whether the photorefractive nonlinear surface waves real indeed. Second, MATLAB simulation is based on the diffusion-drift mechanism, the simulation in order to achieve generation conditions of the photorefractive nonlinear surface wave, in the simulation we use SBN crystal material is the physical and optical parameters. Analyzed the dynamic process is based on the nonlinear Schrodinger equation about soliton self-bending photorefractive nonlinear surface waves, and diffusion-drift mechanism of nonlinear Schrodinger equation for solving with the numerical method. And obtain nonlinear photorefractive surface wave equation in the numerical solution, and gets the description and analysis of numerical solutions.