Influence of Incident Polarization State on Performance of Real-time Transverse Force Sensing using Stokes Parameters in Fiber Bragg Grating

6th conference on Advances in Optoelectronics and Micro/nano-optics

Su, Yang^1 ; Fu, Xinhao^1 ; Zhou, Hua^1 ; Zhu, Yong^1 ; Zhang, Baofu^1 ; Cai, Guangyu^1 ; Guo, Yang^1

Institute of Communications Engineering, PLA University of Science and Technology, Nanjing

210017, China^1

关键词: Azimuth angles;    In-fiber Bragg gratings;    Incident light;    Incident polarization state;    Polarization controllers;    State of polarization;    Stokes parameters;    Transverse force;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/844/1/012042/pdf
DOI  :  10.1088/1742-6596/844/1/012042

来源: IOP

【 摘 要 】

Stokes parameters can be advantageously used to obtain real-time transverse force measurements with uniform FBGs. In this paper, we demonstrate here that the state of polarization (SOP) of incident light can be used to improve the performance of the sensor. The model and the simulations are presented. A 3-paddle fiber polarization controller was used to adjust the azimuth angle and ellipse angle of the light. The experimental results show the great influences of incident SOP on the sensitivity and linear range of the system, which is well agreed with the theoretical prediction. The highest sensitivity of 0.9475/kgf was obtained with good linearity.