基于声光效应的同源共束相干探测方法研究  

Research on coherent detection method with one source and collinear beam based on acousto-optic effect

作　　者：何宁[1] 周江[1] 廖欣[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《激光与红外》2012年第11期1282-1285,共4页Laser & Infrared

基　　金：国家高技术研究项目(No.2007AA0860)资助

摘　　要：以声光衍射为基础,提出一种基于声光效应的同源共束相干探测方法,对衍射光束特性及应用于相干光探测系统进行描述,分析了高斯光斑和平顶光斑实现相干探测的特征,给出系统实现的条件和依据,得出光斑均匀化与两束光斑的共轴位置关系,验证了这种方法的实现基础,实验测试表明声光互作用与相干探测技术结合在通信探测系统应用中具有一定优势,采用均匀化光斑可提高相干光探测的效果,接收性能可靠。Based on the acousto-optic effect, this paper presents a new coherent detection method with a same source and a common beam. It describes the characteristics of diffraction beam for coherent optical detection system. And it analyzes the characteristics of coherent detection by using a Gaussian spot and a flattened spot respectively. Given the conditions and methods of realizing this system, it obtains the homogenization and the coaxial relations between the two spots, which can verify the feasibility of this method. The experiments prove that there are advantages in the communi- cation detection system by using the acousto-optic interaction and coherent detection technology. With the effect of ho- mogenized spot, the effectiveness of optical coherent detection can be improved, which can make the receiver perform- ance more reliable.

关 键 词：声光效应 同源共束 布拉格衍射 光斑均匀化 相干探测 

分 类 号：TN911[电子电信—通信与信息系统]