新一代光纤智能传感网与关键器件基础研究进展

天津大学在973计划项目的资助下，开展了光纤传感技术相关研究.其主要内容包括设计了基于光子晶体光纤的填充银线的PCF-SPR传感器，最佳灵敏度为2 400 nm/RIU；设计了一种基于液芯光子晶体光纤的PBG-PCF温度传感器，传感器的最高分辨率为4×10³ nm/RIU；设计了基于甲苯-氯仿混合溶液填充的光子晶体光纤可调谐热敏光开关，通过改变溶液配比实现不同温度跃变点；构建了基于光微流体理论的3种结构模型，并针对模式场分布及磁场探测展开了研究；构建了基于L波断掺饵光纤放大器的光纤内腔气体传感系统，其绝对误差小于0.04%；针对传感器结构、解调光路、解调算法，设计并优化了F-P传感系统；提出了针对光纤传感网的评估鲁棒性模型，开展了梳状暗调谐光源技术和OFDR技术在光纤传感网检测方面的研究.

Research Progress of a New Generation of Smart Fiber Sensing Networks and the Key Devices

By the funding of 973 projects,Tianjin University launched studies on fiber sensing technologies,mainly including the design of a PCF-SPR sensor based on photonic crystal fiber filling with silver wire，with optimum sensitivity of 2 400 nm/RIU,the design of a PBG-PCF temperature sensor based on liquid core photonic crystal fiber,with maximum resolution of 4×10⁶ nm/RIU,the design of a tunable thermo optical switch based on photonic crystal fiber filled with toluene-chloroform mixed solution,which had different temperature transition points by changing the ratio of the solution,the construction of three kinds of structure models based on the theory of optofluidics,with studies on the mode distributions and the detection of the magnet,and the establishment of the optical gas sensing system based on L-band EDFA with absolute error less than 0.04%.According to the sensor structure,the optical path demodulation and the demodulation algorithm,the F-P sensing system was designed and optimized.A method of evaluating the robustness of the fiber sensing network was presented.Studies of comb tunable light source technology and OFDR technology in fiber sensing network detection were developed.