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基于偏芯熔接光纤的应力与折射率传感器

Strain and Refractive Index Sensor Based on Core-Offset Splicing Fibers

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摘要

基于偏芯熔接技术构建了一种新型马赫-曾德尔干涉(MZI) 原理的应力与折射率光纤传感器。该传感器是由一段单模光纤的两端实施偏芯熔接而成。利用光纤包层模、纤芯模对应力和折射率的敏感特性, 实现对外界折射率和应力的测量。研究结果表明, 施加轴向应力范围为0~500 με时, 传感器的近红外透射光谱的波长出现蓝移, 在1585 nm附近干涉谷处的应力灵敏度约为-7.00 pm/με; 外界折射率在1.331~1.398 RIU(RIU为单位折射率)范围时, 传感器的近红外透射光谱的波长出现蓝移, 在1570 nm附近干涉谷处的折射率灵敏度约为-55.223 nm/RIU; 且均具有良好的线性拟合效果。该传感器也可应用于温度等其他参数测量, 具有非常广阔的应用前景。

Abstract

A novel fiber sensor for measuring strain and refractive index based on fiber Mach-Zehnder interference (MZI) principle and core-offset splicing technology was designed. The sensor was composed of a single mode fiber at both ends with core-offset fibers. Measurement of external refractive index and strain was realized based on sensitive characteristic of optical fiber cladding mode and core mode to strain and refractive index. The tested results indicate that wavelength of near infrared transmission spectrum shifts to shorter wavelength with a sensitivity about -7.00 pm/με at the dips 1585 nm under an axial strain 0-500 με; the wavelength shifts to shorter wavelength side with a sensitivity about -55.223 nm/RIU at the dips 1570 nm under 1.331-1.398 RIU refractive index, where RIU is refractive index unit. The fitting has a good linearity. This fiber sensor can also be applied to other sensing fields and have good prospects.

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中图分类号:O436

DOI:10.3788/aos201737.1006005

所属栏目:光纤光学与光通信

基金项目:国家自然科学基金(61405096)、南京邮电大学优秀人才支持计划项目(NY214158)

收稿日期:2017-05-08

修改稿日期:2017-06-01

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王 旗:南京邮电大学光电工程学院, 江苏 南京 210046
邹 辉:南京邮电大学光电工程学院, 江苏 南京 210046
韦 玮:南京邮电大学光电工程学院, 江苏 南京 210046

联系人作者:王旗(15205185300@163.com)

备注:王 旗(1995-), 男, 硕士研究生, 主要从事特种光纤方面的研究。

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引用该论文

Wang Qi,Zou Hui,Wei Wei. Strain and Refractive Index Sensor Based on Core-Offset Splicing Fibers[J]. Acta Optica Sinica, 2017, 37(10): 1006005

王 旗,邹 辉,韦 玮. 基于偏芯熔接光纤的应力与折射率传感器[J]. 光学学报, 2017, 37(10): 1006005

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