一种双芯LPFG边缘滤波解调新方法  

New method of edge filter demodulation system based on twin-core LPFG structured fiber

作　　者：魏沛雯 葛海波[1] 杨勇[1] 

机构地区：[1]西安邮电大学电子工程学院,西安710061

出　　处：《光通信技术》2016年第11期27-29,共3页Optical Communication Technology

基　　金：陕西省自然科学基金项目(2011JM8038)资助

摘　　要：从双芯长周期光纤光栅(LPFG)的透射光谱和光纤布喇格光栅(FBG)的反射光谱解调原理角度出发,利用双芯LPFG在特定波长范围内的线性边缘滤波特性,设计了一种采用双芯LPFG解调的温度传感系统。给出并分析了双芯LPFG边缘滤波解调原理,通过理论计算和系统仿真,实现了在5nm范围内的温度传感信号的解调。其温度灵敏度达到0.0115nm/℃,线性拟合度为99.48%。Proceeding from the demodulation principle of twin-core long period fiber grating（LPFG） transmis- sion spectrum and fiber Bragg grating （FBG） reflectance spectrum, and the linearity of the edge filter in a specific wavelength range of twin-core LPFG, it designed a kind of twin-core LPFG demodulation system to demodulate temperature sensing signal. And through the theoretical calculation and system simulation, the demodulation of temperature sensing signal in the range of 5nm is realized, the temperature sensitivity of the temperature sensor is 0.0115nm/℃, and the linear fitting degree is 99.48%.

关 键 词：传感技术 光纤布喇格光栅 双芯长周期光纤光栅 边缘滤波解调 温度 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]