基于FBG差分群时延的微压力传感方法研究  

A Novel Fiber Bragg Grating Sensor for Weak Pressure Measurement Based on the DGD

作　　者：彭晖 房晓丽 PENG Hui;FANG Xiaoli(Hunan Institute of Information Technology,Changsha 410151,CHN)

机构地区：[1]湖南信息学院,长沙410151

出　　处：《光电子技术》2022年第4期298-302,共5页Optoelectronic Technology

基　　金：湖南省教育厅科学研究项目(19B395、22B1026)。

摘　　要：提出了一种基于光纤光栅差分群时延(Differential Group Delay,DGD)的微压力传感新方法,给出了理论分析和实验结果。在外界压力作用下,由于压力致双折射效应,光纤光栅两个线偏振光的群时延发生变化。仿真结果表明,DGD峰值与压力在一定的测量范围内存在线性关系。实验结果证明,在0~0.3 MPa的压力条件下,实验压力灵敏度为424.2 ps/MPa,实验结果与理论分析吻合较好,验证了该方法的可行性。A novel sensor based on the Differential Group Delay(DGD)of FBG was proposed in this paper.The evolution of the DGD with respect to pressure was studied theoretically and experimentally.A theoretical model for pressure sensing by use of DGD was built and numerically simulation was also carried out.The experimental pressure sensitivity was 424.2 ps/MPa at 0 MPa to 0.3MPa.Good agreements between experiment results and numerical simulations could verify the feasibility of the method.

关 键 词：微压力 光纤光栅 差分群时延 压力灵敏度 

分 类 号：TN29[电子电信—物理电子学]