Rotation angle measurement method based on self-mixing interference of a fiber laser

被引：3
|
作者：
Zhao, Yan [1 ,2 ]
Zhang, Yonghang [1 ,2 ]
Zhang, Haiwei [3 ,4 ]
Xue, Lifang [3 ,4 ]
Ren, Minjia [3 ,4 ]
Miao, Yinping [3 ,4 ]
机构：
[1] Tianjin Univ Technol, Sch Elect Engn & Automat, Tianjin 300384, Peoples R China
[2] Tianjin Key Lab Control Theory & Applicat Complic, Tianjin 300384, Peoples R China
[3] Tianjin Univ Technol, Sch Integrated Circuit Sci & Engn, Tianjin 300384, Peoples R China
[4] Tianjin Key Lab Film Elect & Commun Device, Tianjin 300384, Peoples R China
来源：
APPLIED OPTICS | 2022年 / 61卷 / 11期
基金：
中国国家自然科学基金;
关键词：
INTERFEROMETRY; RANGE;
D O I：
10.1364/AO.451675
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A rotation angle measurement method based on self-mixing interference (SMI) of a fiber laser is proposed. The rotation angle can be calculated indirectly by the displacement measured by SMI. In the experiment, a linear cavity fiber laser with simple structure and high flexibility is used as the optical source for measuring the deflection angle. To improve the measurement accuracy, the SMI signal is filtered by the variational mode decomposition (VMD) algorithm. The filtered SMI signal is normalized by Hilbert transform. The even-power algorithm is used to sub divide the interference fringes, so as to improve the measurement resolution. The experimental result shows that the measurement error of angular shift is less than 1% in the range of 10 degrees. (C) 2022 Optica Publishing Group
引用
收藏
页码：3174 / 3181
页数：8
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