马赫曾德尔单频干涉仪非线性误差分析  

Nonlinear error analysis of homodyne Mach-Zehnder interferometer

作　　者：李志栋[1] 邓士光[1] 桑峰[1] 郭泾平[2] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191 [2]中国空间技术研究院,北京100094

出　　处：《应用光学》2011年第4期730-735,共6页Journal of Applied Optics

基　　金：中国科学院知识创新项目(AA20090024)

摘　　要：研究了马赫曾德尔单频干涉仪对可调谐激光器进行频率监测时非理想1/4波片和偏振分光镜引入的非线性误差。借助琼斯矩阵对干涉仪建模,理论推导了系统误差公式。理论分析和数值仿真发现:系统的非线性误差为一次谐波误差和二次谐波误差的线性叠加;系统中2个偏振分光镜倾斜角度的非对称主要导致一次谐波误差;波片倾斜角度误差、偏振分光镜倾斜角度误差以及波片相位延迟误差主要导致二次谐波误差,总二次谐波误差近似表现为此3类误差源独立产生的误差的线性叠加;当偏振分光镜消偏比较大时,其产生的误差可忽略。Nonlinear errors were introduced by non-ideal 1/4 wave plate and polarizing beam splitter（PBS） when using a homodyne Mach-Zehnder interferometer to monitor the optical frequency of a tunable laser.The error formula of the system was theoretically deduced by mathematically modeling the interferometer with Jones matrix.Theoretical analysis and numerical simulation indicated that the nonlinear errors of the system were the linear superposition of first and second harmonic wave errors,the first harmonic wave errors were mainly caused by the unbalance of the two PBSs＇ alignment errors,the second were mainly caused by wave-plate＇s alignment errors,PBS＇s alignment errors and wave plate＇s phase delay errors,and the overall second harmonic wave errors were approximately the linear superposition of the errors caused independently by these three error sources,errors caused by polarization leakage of the PBS could be neglected if the leakage was small.

关 键 词：光学测量 非线性误差 马赫曾德尔干涉仪 波片 偏振分光镜 

分 类 号：TN206[电子电信—物理电子学] TH741[机械工程—光学工程]