填充型增敏式光子晶体光纤压力传感器结构  

Structure of sensitized photonic crystal fiber pressure sensor filled with liquid

作　　者：钱诗婷 廖秋雨 高翔 张克非[2] QIAN Shiting;LIAO Qiuyu;GAO Xiang;ZHANG Kefei(School of Science, Southwest University of Science and Technology, Mianyang 621010, China;School of Computer Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China)

机构地区：[1]西南科技大学理学院,绵阳621010 [2]西南科技大学计算机科学与技术学院,绵阳621010

出　　处：《激光技术》2021年第2期224-228,共5页Laser Technology

基　　金：四川省大学生创新创业训练计划资助项目(s201910619012);四川省高等教育人才培养质量和教学改革基金资助项目(19sjjg21);西南科技大学校级重点教育教学改革与研究基金资助项目(19xnzd21)。

摘　　要：为了实现光纤传感器压力增敏的效果,设计了一种具有高双折射的光子晶体光纤结构。采用有限元法计算光子晶体光纤在不同应力作用下的有效折射率,基于光子晶体光纤的压敏特性,分析光子晶体光纤的模式,并选择该结构里的一个空气孔,填充具有特定折射率的液体材料,构成新型压力传感器。该结构的压力灵敏度由COMSOL软件的仿真得出。结果表明,经填充液体后,偏振相位灵敏度从72rad/(MPa·m)提升至128rad/(MPa·m),显著提高了77.7%。该研究对增强传感器的力学性能有帮助。In order to achieve the effect of pressure sensitization of optical fiber sensor,a photonic crystal fiber structure with high birefringence was designed.The effective refractive index of photonic crystal fiber was calculated by the finite element method when it was applied different stress.Based on the pressure-sensitive characteristics of photonic crystal fiber,the mode of photonic crystal fiber was analyzed.An air hole in the structure was selected and filled with the liquid of specific refractive index.A new pressure sensor was formed by above structures.The pressure sensitivity of the structure was simulated by COMSOL.The simulation results show that the polarization phase sensitivity of photonic crystal fiber sensor increases from 72rad/(MPa·m)to 128rad/(MPa·m).The sensitivity is improved by 77.7%significantly,which contributes to enhance the properties of the sensor.

关 键 词：光纤光学 光子晶体光纤 有限元法 选择性液体填充 压力增敏 压力传感器 

分 类 号：TN253[电子电信—物理电子学] TP212.44[自动化与计算机技术—检测技术与自动化装置]