光反馈自混合干涉信号预处理方法  

Pre-processing for the optical feedback self-mixing interferomitric signal

作　　者：禹延光[1] 郭常盈[1] 叶会英[1] 袁秀娟[1] 

机构地区：[1]郑州大学信息工程学院,郑州450052

出　　处：《激光技术》2008年第3期265-267,271,共4页Laser Technology

基　　金：国家自然科学基金资助项目(60574098)

摘　　要：为了提高参数估计的精确度,根据光反馈自混合干涉信号的特点,采用对原始光反馈自混合实验信号进行滤波和归一化等预处理方法,有效地滤除了噪声,使信号平坦化,而且预处理后的实验信号与理论模型仿真数据更加吻合。分别利用原始实验信号和预处理后的信号对参数进行估计,比对结果表明,使用预处理后的光反馈自混合信号进行参数估计,线宽展宽因数和光反馈水平因子C的测量精度分别提高了5.52%和4.55%。For improving the precision of the parameter estimate, a set of pie-processing methods including filtering and normalization were proposed for the initial experimental signal according to the characteristics of the optical feedback self-mixing interference signal. The proposed approach implements filtering of noise effectively and flat the signal. The pre-processed OFSMI experimental signal tallied much with the theoretic signal. Estimating parameters using the initial and the pre-processing signal separately, comparison results show that the latter can make the accuracy of the line width spreading factorand the optical feedback level factor C improve by 5.52% and 4.55% Key words：

关 键 词：激光技术 预处理 归一化 光反馈自混合干涉 线宽展宽因数 

分 类 号：O436.1[机械工程—光学工程]