摘要
基于布喇格衍射,讨论了多频声光衍射时三阶互调现象与频率之间的关系。以两个不同频率信号同时加载到声光偏转器的情况为例,具体分析了三阶互调产物的产生过程、光束衍射方式和频谱结构分布。针对三阶互调产物对系统准确探测信号的影响,介绍了几种减小三阶互调的方法。
Based on bragg diffraction, the relationship between frequency and the phenomenon of the third order intermodulation generated during multi-frequency acousto-optic diffraction is discussed. By taking two different frequencies as example, the generated process, the ways of acousto-optic diffraction and the spectral distribution of the third order intermodulation product are detailedly analyzed. Since the third order intermodulation product is the main factor affecting the accuracy of the detected results, some ways to minimize the third order intermodulation product are introduced.
出处
《光通信技术》
CSCD
北大核心
2009年第5期54-56,共3页
Optical Communication Technology
基金
国家863计划(2007AA0860)资助
广西研究生教育创新计划项目(2008105950810M416)资助
关键词
布喇格衍射
多频声光衍射
三阶互调
bragg diffraction,multi-frequency acousto-optic diffraction,the third order intermodulation
