The effects of temperature on the stability and evolution of separate photovoltaic bright–dark spatial soliton pair

Abstract

The temperature effects on the evolution and stability of a separate photovoltaic bright–dark soliton pair formed in a serial photovoltaic photorefractive crystal circuit have been investigated. Our numerical results show that adjusting each crystal temperature can affect the dynamical evolution of the soliton formed in the other crystal. For a stable bright–dark soliton pair originally formed in a crystal circuit at given temperatures, when one crystal temperature changes, the soliton supported by the other crystal will evolve into another stable soliton if the temperature change is quite small, whereas it will become unstable and experience larger cycles of compression or break up into beam filaments if the temperature difference is big enough. The bright soliton and dark solitons have their own stable temperature regime.