基于Cu∶KNSBN晶体的自泵浦相位共轭实验,研究了光折变晶体的几何结构对自泵浦相位共轭特性的影响,得到在入射角不变的情况下,随着入射位置的变化相位共轭光输出有最大值,几何结构不同最大值输出对应的位置不同.并从理论上分析了晶体结构在双作用区自泵浦相位共轭机制中的作用,指出几何结构、入射位置与自泵浦光通道、耦合系数的关系及在自泵浦相位共轭效应中存在一个最佳入射光工作位置.

Based on self-pumped phase conjugation experiment in Cu-doped KNSBN crystal, the influence of the photorefractive crystal geometry configuration on self-pumped phase conjugate properties was investigated.The maximum output configuration is funded in variety in the position.The different configuration carry with them corresponding maximum output position.The action of crystal geometry configuration on the two coupled interaction regions self-pumped phase conjugate mechanism was analyzed with theory.The relation between geometry configuration and incident position and beam path and beam-coupling coefficient was built.The optimal work position in self-pumped phase conjugation effect was given.