根据二波相互作用的耦合波方程组,研究了空间电荷场等相面发生倾斜和弯曲的规律及由此产生的四波混频(FWM)中相位共轭波的两类波前畸变,并给出了定量表示的具体方法.以BSO晶体为例数值计算了各种实验参数的影响,结合相位共轭波衍射效率和角分辨率,讨论了晶体厚度和外加电场等参数的合理选取.

Using two beam-coupling equations to describe space-charge field, we investigated the inclination and the bent of the equiphase surface, which would cause two kinds of wave-front distortion of phase conjugate wave in four- wave mixing (FWM). The qualitative method destribing the distortion was obtained. Through numerical calculation, the effects of varied experimental parameters were presented. The length of the crystal and the applied electric field, which were related to the diffraction efficiency and the resolving power were also discussed.