布拉格声光衍射场光强空间分布不均匀的研究  

Study of Inhomogeneous Spatial Distribution of Scattering Light Intensity of Bragg Acousto-optic Interaction

作　　者：刘唤唤[1] 曾晓东[1] 程寅[1] 傅超[1] 

机构地区：[1]西安电子科技大学技术物理学院,陕西西安710071

出　　处：《电子科技》2010年第3期1-3,共3页Electronic Science and Technology

基　　金：国家863计划基金资助项目(20060701010)

摘　　要：从波动方程出发,结合声光移频器的工作原理,根据声光晶体的有限尺寸,建立声场模型,推导出布拉格声光作用的耦合波方程。有限差分方法分析衍射场光强的空间三维分布。结果表明,声场振幅的不均匀分布会影响声光衍射场的光强分布。Derived from the wave equation and the principle of acousto-optic frequency shifter, coupled-wave equations of Bragg acousto-optic interaction are obtained, on the basis of a model of the acoustic field which is built in view of the finite size of acousto-optic crystal. The spatial three-dimensional distribution of scattering field is analyzed with finite difference method. It is shown that the diffractive light intensity will be influenced by the inhomogeneous distribution of acoustic amplitude.

关 键 词：声光移频器 布拉格声光衍射场 光强 空间不均匀分布 有限差分法 

分 类 号：TN65[电子电信—电路与系统]