A sensitive method of determining optic axis azimuth based on laser feedback  

作　　者：吴云 张鹏 陈文学 谈宜东 

机构地区：[1]The State Key Lab of Precision Measurement Technology and Instrument, Department of Precision Instruments, Tsinghua University

出　　处：《Chinese Physics B》2013年第12期272-275,共4页中国物理B（英文版）

基　　金：Project supported by the Natural Science Foundation of Beijing,China(Grant No.3091002)

摘　　要：A sensitive method to determine the optic axis azimuth of the birefringence element is presented, which is based on laser feedback. The phase difference between the two intensities in birefringence feedback changes with the angle between the optic axis of the birefringence element and laser original polarization. The phase difference is highly sensitive to the relative position of the optic axis and the laser original polarization. This method is used to highly precisely determine the optic axis azimuth, and is able to distinguish between the fast axis and the slow axis of the birefringence element. Theoretical analysis and experimental results are both demonstrated.A sensitive method to determine the optic axis azimuth of the birefringence element is presented, which is based on laser feedback. The phase difference between the two intensities in birefringence feedback changes with the angle between the optic axis of the birefringence element and laser original polarization. The phase difference is highly sensitive to the relative position of the optic axis and the laser original polarization. This method is used to highly precisely determine the optic axis azimuth, and is able to distinguish between the fast axis and the slow axis of the birefringence element. Theoretical analysis and experimental results are both demonstrated.

关 键 词：laser feedback optic axis differential method phase difference 

分 类 号：TN24[电子电信—物理电子学]