双波门自适应阈值法对光束质量M^2因子测量精度的影响  

Influence of double wave door adaptive threshold value on measurement precision of beam quality factor M^2

作　　者：刘敏时[1] 王晓曼[1] 景文博[1] 

机构地区：[1]长春理工大学电子信息工程学院,长春130022

出　　处：《吉林大学学报（工学版）》2012年第4期1066-1070,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(60677009)

摘　　要：为了解决在光斑图像中采用人工阈值选取方法或浮动阈值选取方法对光束质量M2因子的测量精度带来的局限性,提出了双波门自适应阈值方法。实验证明,M2因子相对误差较另外两种方法小,均方差值在0.1以内,x方向和y方向束宽值的均方差值分别为0.0935和0.0962,均小于1%,符合测量要求。To improve the measurement accuracy of beam quality M2 obtained by artificial setting threshold method based on experience or floating threshold method,a double gate adaptive threshold method was presented. Experimental results indicate that beam quality M2 factor relative error of proposed method is the lowest among three methods,and its standard deviation（STDEV） value is less than 0.1. The STDEV value of beam width in x direction and y direction are 0. 0935 and 0. 0962, respectively, which are less than 1%, satisfying the measurement requirement of beam quality/V/2.

关 键 词：光电子学与激光技术 光束质量 二阶距 双波门自适应阈值 误差分析 

分 类 号：TN241[电子电信—物理电子学]