Temperature effects on soliton pairs in novel photorefractive crystals having both the linear and quadratic electro-optic effects

Abstract

Abstract We investigate and formulate a detailed theory studying the temperature effects on bright-dark optical spatial soliton pair in the novel photorefractive crystals having both the nonlinearities i.e., the quadratic and linear electro-optic effects. The coupled modified Nonlinear Schrodinger (NLS) equations is solved exactly to obtain analytical solutions for both the components. There are few physical factors which are dependent on the temperature: the dielectric constant, dark irradiance and the diffusion current. We consider the variation of dielectric constant and dark irradiance to study the effect on the nonlinearity. Various FWHM curves are plotted which give us an idea of the self trapping nonlinearity’s dependence on the temperature