基于花生锥型光纤和长周期光纤光栅的级联式光纤应变/温度双参量传感器（英文）  

Simultaneous Measurement of Strain and Temperature Based on Concatenation of Fiber Peanut Taper and Long-period Fiber Grating

作　　者：顾宁宁 张昊[1] 刘波[1] 康守信 宋彬彬 吴继旋 Gu Ningning;Zhang Hao;Liu Bo;Kang Shouxin;Song Binbin;Wu Jixuan(Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,Institute of Modern Optics,Nankai Universityy Tianjin 300350,China)

机构地区：[1]南开大学现代光学研究所天津市光电传感器与传感网络技术重点实验室

出　　处：《南开大学学报（自然科学版）》2019年第6期23-29,51,共8页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：Supported by the National Natural Science Foundation of China(11274182,61377095,11004110);the 863 National High Technology Program of China(2013AA014201);Science&Technology Support Project of Tianjin(16YFZCSF00400)

摘　　要：提出了一种基于花生锥型光纤和长周期光纤光栅的级联式光纤应变/温度双参量传感器.一部分纤芯模式在花生锥形光纤中耦合到包层,并在长周期光纤光栅中部分耦合回纤芯与剩余纤芯模式发生干涉.根据长周期光纤光栅的相位匹配条件,在长周期光纤光栅的光谱包络中出现一系列干涉条纹.实验结果表明该传感器的最高应变和温度灵敏度分别达到-0.56487 nm/mε和57.29 pm/℃.利用不同干涉峰波长对应变和温度变化的不同灵敏度可以建立双参量传感矩阵.A compact dual-parameter fiber-optic sensor based on concatenation of a fiber peanut taper and long-period fiber grating(LPFG) has been proposed and experimentally demonstrated for simultaneous measurement of strain and temperature. Due to the presence of fiber peanut taper, part of the fundamental core mode could be coupled into fiber cladding modes, part of which would be re-coupled into the fundamental core mode and interfere with the remnant core mode light at the LPFG. Due to the phase matching condition of the LPFG, the interferometric spectral pattern could only be acquired within the transmission resonance spectral envelope determined by the LPFG. Experimental results indicate that the highest strain and temperature sensitivities of the proposed fiber modal interferometer reach-0.564 87 nm/mε and 57.29 pm/℃, respectively. By employing the distinct strain and temperature sensitivities of two interference dips, a sensor matrix could be set up for simultaneous dual-parameter measurement.

关 键 词：光纤模间干涉仪 长周期光纤光栅(LPFG) 花生锥形光纤 应变传感 温度传感 

分 类 号：TN253[电子电信—物理电子学]