Stress Direction Measurement Based on Polarization State in Optical Fibers Using the Quaternion Method

IEEE Photonics Journal

Chongqing Wu¹  Zejia Huang¹  Zhi Wang¹ 

[1] Key Lab of Education Ministry on Luminescence and Optical Information Technology, Institute of Optical Information, School of Science, Beijing Jiaotong University, Beijing, China;

关键词: Birefringence quaternion;    polarization-maintaining fibers;    fiber optics sensor;    fiber stress measurement;   

DOI  :  10.1109/JPHOT.2017.2764102

来源: DOAJ

【 摘 要 】

The state of polarization (SOP) in a polarization-maintaining fiber subjected to external stress is studied using the quaternion method. The stress principal axis on the Poincare sphere is independent of intrinsic birefringence, but has a linear relationship with the direction of external stress. The above linear relationship, in turn, enables a measurement of the external stress's direction by calculating the consecutive trajectory of SOP on the Poincare sphere. This method is proposed and experimentally validated by measuring different types of fibers with maximum angle measurement errors of less than 2.24%.

【 授权许可】

Unknown