A new phase-shifted long-period fiber grating for simultaneous measurement of torsion and temperature  

作　　者：Cuiting Sun Ran Wang Xiren Jin Zemin Wang Weiliang Liu Shuo Zhang Yiwei Ma Jingyu Lin Yue Li Tao Geng Weimin Sun Zhongquan Qu Libo Yuan 孙翠婷;王冉;金夕人;王泽民;刘卫亮;张硕;马一巍;林静雨;李玥;耿涛;孙伟民;屈中权;苑立波(Key Laboratory of In-Fiber Integrated Optics,Ministry of Education,Harbin Engineering University,Harbin 150001,China;Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China;Photonics Research Center,Guilin University of Electronics Technology,Guilin 541004,China)

机构地区：[1]Key Laboratory of In-Fiber Integrated Optics,Ministry of Education,Harbin Engineering University,Harbin 150001,China [2]Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China [3]Photonics Research Center,Guilin University of Electronics Technology,Guilin 541004,China

出　　处：《Chinese Optics Letters》2020年第2期39-43,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.11527804);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 and U1631239);Open Project of Key Laboratory of Astronomical Optics&Technology,Nanjing Institute of Astronomical Optics&Technology,Chinese Academy of Sciences(No.CAS-KLAOT-KF201806);Fundamental Research Funds for the Central Universities;111 Project(No.B13015);the Harbin Engineering University.

摘　　要：A novel phase-shifted long-period fiber grating(PS-LPFG)for the simultaneous measurement of torsion and temperature is described and experimentally demonstrated.The PS-LPFG is fabricated by inserting a pretwisted structure into the long-period fiber grating(LPFG)written in single-mode fiber(SMF).Experimental results show that the torsion sensitivities of the two dips are?0.114 nm/(rad/m)and?0.069 nm/(rad/m)in the clockwise direction,and?0.087 nm/(rad/m)and?0.048 nm/(rad/m)in the counterclockwise direction,respectively.The temperature sensitivities of the two dips are 0.057 nm/℃ and 0.051 nm/℃,respectively.The two dips of the PS-LPFG exhibit different responses to torsion and temperature.Simultaneous measurement of torsion and temperature can be implemented using a sensor.The feasibility and stabilization of simultaneous torsion and temperature measurement have been confirmed,and hence this novel PS-LPFG demonstrates potential for fiber sensing and engineering applications.

关 键 词：phase-shifted long-period FIBER GRATING pre-twisted structure SINGLE-MODE FIBER SIMULTANEOUS measurement TORSION temperature 

分 类 号：TN253[电子电信—物理电子学]