Analytic solutions of dark-dark spatial soliton pair in biased serial PV-PR crystal

摘要

Based on the theory of separate optical soliton pair which is formed in a biased series photovoltaic photorefractive crystal circuit, we derive the dynamical coupled evolution equations, and we get the analytic solutions of the dark-dark soliton pair under low amplitude conditions. We also investigate the interaction of these soliton pair.