Effects of temperature on stability of two-photon separate screening bright-dark spatial soliton pair

In the case of neglecting the loss and diffusion process, the effects of temperature on the evolution and stability of a separate screening bright-dark soliton pair formed in a serial two-photon photorefractive crystal circuit are investigated with numerical method. The result shows that a steady-state bright-dark soliton pair are taken shape in a crystal circuit at given temperature, the soliton supported by the other crystal evolves into another steady-state soliton if the temperature change of one crystal is quite small, whereas it becomes unstable and experience lager cycles of compression or break up into beam filaments if the temperature different is big enough. The dark soliton is more sensitive to the temperature change than the bright one in the separate screening spatial soliton pair.