摘要
We propose and investigate a compact optical fiber sensor that aims to measure the torsion in both amount and direction with high sensitivity.This sensor is configured by a triangular-prism-shaped long-period fiber grating,which is fabricated by the high frequency CO_(2) laser polished method.The unique design of the triangular-shaped structure breaks the rotational symmetry of the optical fiber and provides high sensitivity for torsion measurement.In preliminary experiments,the torsion response of the sensor achieves a good stability and linearity.The torsion sensitivity is 0.54 nm/(rad/m),which renders the proposed structure a highly sensitive torsion sensor.
作者
王森宇
马一巍
李晓飏
易杨
孙翠婷
林静雨
佟成国
李玉祥
耿涛
孙伟民
苑立波
Senyu Wang;Yiwei Ma;Xiaoyang Li;Yang Yi;Cuiting Sun;Jingyu Lin;Chengguo Tong;Yuxiang Li;Tao Geng;Weimin Sun;Libo Yuan(College of Science,Harbin Engineering University,Harbin 150001,China;Photonics Research Center,Guilin University of Electronics Technology,Guilin 541004,China)
基金
supported by the Joint Research Fund in Astronomy under cooperative agreement between the National Natural Science Foundation of China(NSFC)and Chinese Academy of Sciences(CAS)(Nos.U1831115,U1631239,and U1931206)
the Dean Project of Guangxi Key Laboratory of Wireless Broadband Communication and Signal Processing(No.GXKL06190106)
the Key Projects of Natural Science Foundation of Heilongjiang Province(No.ZD2019H003)。