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飞秒激光制作的光纤高温和折射率传感器

Optical Fiber High-Temperature and Refractive Index Sensor Fabricated by Femtosecond Laser

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摘要

将多模光纤两端与单模光纤正对拼接在一起,通过光纤微孔及不同芯径光纤拼接构成一个复杂的马赫-曾德尔干涉仪,利用该干涉仪构成一款新型高温与折射率传感器。实验发现,传感器透射谱中谐振峰波谷dip 1的波长只随环境温度发生线性漂移,波谷dip 1的峰值强度只随环境折射率发生线性漂移。据此利用波谷得到一个关于温度与折射率的测量矩阵,实验测得高温灵敏度达到18.55 pm/℃,折射率灵敏度达到-155.2 dB/RIU(RIU为折射率单元)。利用波谷dip 1的这个特性实现了高温与折射率同时测量,不存在交叉敏感。该传感器结构紧凑简单、性能稳定、灵敏度高。

Abstract

With two ends of the multi-mode fiber and a single-mode fiber spliced together, a complex Mach-Zehnder interferometer is constructed by splicing fiber micropores with fibers of different core diameters. A new fiber optic sensor with high temperature and refractive index is constructed via the interferometer. Through experiment, it is found that the wavelength of the resonant peak valley in the transmission spectrum of the sensor linearly drifts only with the ambient temperature, while the peak intensity of the wave valley dip 1 linearly drifts only with the refractive index in the environment. A measurement matrix for temperature and refractive index of wave valley dip 1 can be obtained. The experimental results show that the high temperature sensitivity is 18.55 pm/℃ and the refractive index sensitivity is -155.2 dB/RIU (RIU is refractivity unit). Simultaneous measurement of the high temperature and refractive index is realized, and there is no cross sensitivity. The sensor has the advantages of compact and simple structure, stable performance and high sensitivity.

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DOI:10.3788/LOP56.170633

所属栏目:功能光纤

基金项目:湖北省自然科学基金、湖北师范大学研究生创新教育基金、湖北师范大学2015年优秀中青年科技创新团队项目;

收稿日期:2019-04-24

修改稿日期:2019-06-24

网络出版日期:2019-09-01

作者单位    点击查看

董航宇:湖北师范大学物理与电子科学学院, 湖北 黄石, 435002
刘昌宁:湖北师范大学物理与电子科学学院, 湖北 黄石, 435002
孙四梅:湖北师范大学物理与电子科学学院, 湖北 黄石, 435002
江超:湖北师范大学物理与电子科学学院, 湖北 黄石, 435002
张傲岩:湖北师范大学物理与电子科学学院, 湖北 黄石, 435002
胡荟灵:湖北师范大学物理与电子科学学院, 湖北 黄石, 435002
王解:湖北师范大学物理与电子科学学院, 湖北 黄石, 435002

联系人作者:江超(jiangchao1969@126.com)

备注:湖北省自然科学基金、湖北师范大学研究生创新教育基金、湖北师范大学2015年优秀中青年科技创新团队项目;

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引用该论文

Hangyu Dong, Changning Liu, Simei Sun, Chao Jiang, Aoyan Zhang, Huiling Hu, Jie Wang. Optical Fiber High-Temperature and Refractive Index Sensor Fabricated by Femtosecond Laser[J]. Laser & Optoelectronics Progress, 2019, 56(17): 170633

董航宇, 刘昌宁, 孙四梅, 江超, 张傲岩, 胡荟灵, 王解. 飞秒激光制作的光纤高温和折射率传感器[J]. 激光与光电子学进展, 2019, 56(17): 170633

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