平顶型CLPG-CFBG级联结构中温度应力传感特性的研究  

Research on temperature strain sensing characteristics of flat top CLPG-CFBG cascade structure

作　　者：吕子尚 胡劲华[1] 任丹萍[1] 赵继军[1] L Zishang;HU Jinhua;REN Danping;ZHAO Jijun(School of Information&Electrical Engineering,Hebei University of Engineering,Handan 056038,China)

机构地区：[1]河北工程大学信息与电气工程学院,邯郸056038

出　　处：《激光技术》2024年第1期65-70,共6页Laser Technology

基　　金：国家自然科学基金资助项目(61905060);河北省高等学校科学技术研究项目(ZD2021019)。

摘　　要：为了使光纤光栅传感器在光纤传感系统的应用中同时具有温度应力双参量传感和通信传输的功能,提出了一种由啁啾长周期光纤光栅(CLPG)和啁啾光纤布喇格光栅(CFBG)组成的平顶型光纤光栅传感器结构。采用测量中心波长位移的方法,建立了传感器温度和应力灵敏度系数矩阵,进行了理论分析和仿真验证。结果表明,CLPG的温度和应力灵敏度大小分别为2660 pm/℃和132 pm/με;CFBG的温度和应力灵敏度大小分别为12.6 pm/℃和0.8 pm/με,且CLPG和CFBG同时都具有平顶输出光谱,平顶光谱带宽分别达到了13.8 nm和5.6 nm,该传感器可以实现温度应力双参量同时传感,具有稳定的通信传输波段。该研究为光纤光栅传感器在光纤传感系统中的应用提供了参考。In order to make the fiber grating sensor have the functions of temperature/strain dual-parameter sensing and communication transmission in the application of fiber sensing system,a new flat-top fiber grating sensor structure composed of the chirped long period grating(CLPG)and chirped fiber Bragg grating(CFBG)was proposed.The sensitivity coefficient matrix of temperature and strain of the sensor was established by measuring the displacement of the center wavelength,and the theoretical analysis and simulation were carried out.The results show that,the temperature and strain sensitivities of CLPG were 2660 pm/℃and 132 pm/με,respectively.CFBG sensitivities were 12.6 pm/°C for temperature and 0.8 pm/μεfor strain.Both CLPG and CFBG had flat-top output spectra at the same time,and the flat-top spectral bandwidths reached 13.8 nm and 5.6 nm,respectively.The sensor can realize the simultaneous sensing of both parameters of temperature/strain and has a stable communication transmission band.This study serves as a reference for the application of fiber grating sensors in fiber sensing systems.

关 键 词：光纤光学 光纤光栅传感器 啁啾光纤光栅 平顶光谱 温度 应力 

分 类 号：TN253[电子电信—物理电子学]