Abstract
Based on the theory of separate spatial soliton pair and the evolution of Gaussian beam in a photorefractive crystal, we investigate the effect of the dark soliton crystal temperature on the dynamical evolution of Gaussian beam in a biased series circuit consisting of two non-photovoltaic photorefractive crystals numerically. Results show that adjusting the temperature of the dark soliton crystal can modulate the dynamical evolution of Gaussian beam in the other crystal. For example, the matched Gaussian beam cannot evolve into a solitary wave when the change of the dark soliton crystal temperature is large enough and a mismatched Gaussian beam can evolve into a stable bright soliton by adjusting the temperature of the dark soliton crystal. Some examples are given in this paper.
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