基于光纤偏振特性的压力传感中测量范围的拓展方法  

Measurement Range Expansion of Pressure Sensing Using Fiber Polarization

作　　者：张超 苏洋 王艺敏 汪井源 李建华 Zhang Chao;Su Yang;Wang Yimin;Wang Jingyuan;Li Jianhua(College of Communication Engineering,Army Engineering University,Nanjing,Jiangsu 210014,China)

机构地区：[1]陆军工程大学通信工程学院,江苏南京210014

出　　处：《激光与光电子学进展》2021年第19期126-131,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61975238)。

摘　　要：测量范围的拓展对提升基于偏振特性的光纤压力传感系统的实用性有着重要意义。以拓宽测量范围并保持原有传感灵敏度为目标,提出了一种基于斯托克斯多参量融合的传感方案。通过理论仿真得到传感头目标偏振轴。利用偏振控制器,压力装置和偏振检测计,在实验中得到了线性度为99.8%、灵敏度为0.1938 N^(-1)、测量范围为28 N的传感性能,多参量融合方案的测量范围比单参量测量方案提高了5倍。实验结果与理论预期吻合较好。所提方案可以大幅度提升基于光纤偏振特性的传感系统的性能并扩展了其实用价值。Expanding the measurement range of the optical fiber can substantially improve the applicability of pressure sensing system based on polarization properties.Accordingly,a sensing method based on the fusion of multiple Stokes parameters is proposed to expand the measurement range while ensuring high sensitivity.The polarization rotation axis of the sensor is obtained using theoretical simulations.Then,polarization controllers,a pressure device,and a polarimeter are used to achieve a sensing performance with a linearity of 99.8%,sensitivity of 0.1938 N^(−1),and measurement range of 28 N.The measurement range of the proposed multiparameter fusion method is five times larger than that of the methods based on single-parameter measurement,confirming the theoretical design.The proposed method can highly improve the performance and applicability of sensing systems based on polarization properties.

关 键 词：光纤光学 光纤压力传感 斯托克斯参量 测量范围 偏振旋转轴 灵敏度 

分 类 号：O436[机械工程—光学工程]