基于酒精选择性填充光子晶体光纤的Sagnac应变传感器  

Optic-Fiber Sagnac Strain Sensor Based on Alcohol Selectively-Filling Photonic Crystal Fiber

作　　者：胡海峰[1] 李雪刚[1] 周雪[1] 赵勇[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2016年第12期1688-1690,1709,共4页Journal of Northeastern University(Natural Science)

基　　金：国家杰出青年科学基金资助项目(61425003);国家自然科学基金资助项目(61273059);流程工业综合自动化国家重点实验室基础科研业务费资助项目(2013ZCX09)

摘　　要：提出了一种基于酒精选择性填充光子晶体光纤的新型Sagnac光纤环应变传感器,实现了对微小应变的高灵敏度测量.利用酒精对光子晶体光纤的选择性填充使之产生双折射效应,并将已经填充好的光子晶体光纤嵌入到Sagnac干涉环中,实现了Sagnac干涉效应.当给光子晶体光纤施加应变时,Sagnac干涉谱的波峰会随着应变变化而变化,实现对应变的测量.实验结果表明,当微应变在0-3 958时,测量微应变的灵敏度能够达到3.66 pm.同时,本结构具有高灵敏度、高稳定性、抗电磁干扰、易于搭建等优点.A newoptic-fiber Sagnac strain sensor based on alcohol filling photonic crystal fiber was proposed and demonstrated,by which measuring the minute strain could be achieved. The birefringence of the photonic crystal fiber（ PCF） was produced by alcohol selectively-filling the air holes of the PCF. And then the alcohol selectively-filling photonic crystal fiber was embedded in the Sagnac loop and the Sagnac interference effect was achieved. Then the peak wavelength of the Sagnac interference spectrum could be changed by strain because the peak wavelength shift was directly proportion to strain change. The micro strain sensitivity is measured to be 3. 66 pm in a micro strain range from 0 to 3 958.

关 键 词：光子晶体光纤 Sagnac应变传感器 应变 酒精选择性填充 传感器 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]