基于AD8302的激光外差干涉信号解调技术  

Laser heterodyne interference signal processing system based on AD8302

作　　者：刘丹[1] 郑宾[1,2] 郭华玲[1,2] 刘辉[1] 

机构地区：[1]中北大学信息与通信工程学院,太原030051 [2]中北大学电子测试技术重点实验室,太原030051

出　　处：《激光技术》2015年第3期333-336,共4页Laser Technology

基　　金：教育部博士点基金资助项目(2103142012007)

摘　　要：为了改善传统硬件相位测量中存在电路复杂、测量精度低、工作频带宽窄等诸多缺陷,利用AD8302的良好高频测相能力,设计了一种新的激光外差干涉信号处理系统,分析了其工作原理,并取得了静态、动态实验数据。结果表明,系统测量误差小于0.5°,使外差干涉理论测量分辨率提高到0.088nm,更有利于微振动信号的测量。In order to overcome defects of the traditional phase measurement hardware,such as circuit complexity,low measurement precision and narrow band width,a novel signal processing system of a laser heterodyne interferometer was designed based on AD8302 with good performance. The work theory of the system was analyzed in detail. Static and dynamic experimental data were obtained. The results show that measurement error of the system is less than 0. 5° and the measurement resolution of heterodyne interference can reach 0. 088 nm in theory which is more conductive to measure the microvibration signal.

关 键 词：测量与计量 高频测相 AD8302 激光外差干涉 微振动信号 

分 类 号：TN247[电子电信—物理电子学] TN763