摘要
互不相干的两对相干光束同时作用于一块光折变晶体，在小调制度的情况下（即晶体对光强的反应是线性的），依然会出现明显的空间频率为两个基频的组合的内部空间电场分量。本文从基本的Ｋｕｋｈｔａｒｅｖ方程组出发，把电场和电子数密度直接分解为组合频率的傅里叶分量，以解析解的形式给出了空间频率分别为Ｋ１－Ｋ２、Ｋ１＋Ｋ２、２Ｋ１和２Ｋ２的电场分量。
A mixing configuration defined as double two wave mixing is studied theorectically, which consists of two sets of two mutually beams interacting with the same photorefractive volume. Analytical solutions of the 2 order (2K 1 and 2K 2) and the main combination components (K 1+K 2 and K 1-K 2) of the two primary space charge field are given. Under certain relations between K 1 and K 2, the 2 order and the main cross components are so large that can′t be neglected.
出处
《光学学报》
EI
CAS
CSCD
北大核心
1997年第6期692-696,共5页
Acta Optica Sinica
关键词
双二波耦合
基频
内部空间电场
组合频率
two wave mixing, double two wave mixing, the primary field complement, the second order field component.
