拉锥空心光纤的温度与应力传感特性研究  

Study on Temperature and Strain Sensing Characteristics of Tapered Hollow Fiber

作　　者：鲁志琪 刘昌宁 许秀梅 周文标 陈宁 江婉君 LU Zhiqi;LIU Changning;XU Xiumei;ZHOU Wenbiao;CHEN Ning;JIANG Wanjun(College of Physics and Electronic Science,Hubei NormalUnivesity,Huangshi 435002,China)

机构地区：[1]湖北师范大学物理与电子科学学院,湖北黄石435002

出　　处：《压电与声光》2023年第1期139-143,148,共6页Piezoelectrics & Acoustooptics

基　　金：湖北省高等学校优秀中青年科技创新团队计划项目(T2020014);湖北师范大学省级大学生创新创业训练计划项目(S202210513051);湖北师范大学研究生科研创新项目(20220501)。

摘　　要：该文设计并制作了一款简易的拉锥空心光纤的高灵敏度传感器,通过实验测量了其温度与应力特性。首先利用光纤熔接机在两段标准单模光纤之间熔接一段空心光纤,再对准空心光纤中间位置进行放电,同时运用两个步进电机在单模光纤两端施加一定的拉力,这导致法布里-珀罗干涉仪转换为马赫-曾德尔干涉仪。实验结果表明,此拉锥过程使光纤传感器的温度灵敏度从理论值0.85 pm/℃提升到69.1 pm/℃,约提升了81.3倍,轴向应变灵敏度最高可达3.6 pm/με。该器件具有体积小、结构简单和灵敏度高等特点,在航空航天、医疗监测等领域具有广阔的应用前景。In this paper,a simple sensor with high sensitivity based on tapered hollow fiber was designed and fabricated,and its temperature and strain characteristics were measured by experiments.Firstly,a section of hollow fiber was fused between two standard single-mode fibers by using the optical fiber fusion splicer,and then a discharge was applied to the middle of the hollow fiber,while two stepper motors were used to apply a certain tension at both ends of the single-mode fiber,which led to the conversion of Fabry-Perot interferometer to Mach-Zehnder interferometer.The experimental results show that the temperature sensitivity of the fiber optic sensor is improved from the theoretical value of 0.85 pm/℃to 69.1 pm/℃by approximately 81.3 times and the axial strain sensitivity is up to 3.6 pm/μεafter the tapered process.The device has the characteristics of small size,simple structure and high sensitivity,and has a broad application prospect in aerospace,medical monitoring and other fields.

关 键 词：温度传感器 应力传感器 空心光纤 拉锥 干涉仪 光纤熔接 

分 类 号：TN253[电子电信—物理电子学]