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基于可调谐激光器稀疏采样的高灵敏度光纤盐度传感器

YANG Yuqiang CHEN Xianchang MU Xiaoguang YU Zhenjie QIN Jiangbo HUANG Zhihao LI Fujiang

光学精密工程2025，Vol.33Issue(22)：3449-3459,11.
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光学精密工程2025，Vol.33Issue(22)：3449-3459,11.DOI:10.37188/OPE.20253322.3449

基于可调谐激光器稀疏采样的高灵敏度光纤盐度传感器

High-sensitivity fiber optic salinity sensor based on sparse sampling of tunable laser

YANG Yuqiang 1CHEN Xianchang 1MU Xiaoguang 2YU Zhenjie 1QIN Jiangbo 3HUANG Zhihao 1LI Fujiang4

作者信息

  • 1. Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching,Guangdong Ocean University,Zhanjiang 524088,China||Research Center of Guangdong Smart Oceans Sensor Networks and Equipment Engineering,Guangdong Ocean University,Zhanjiang 524088,China
  • 2. Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching,Guangdong Ocean University,Zhanjiang 524088,China||College of Mechanical Engineering,Guangdong Ocean University,Zhanjiang 524088,China
  • 3. Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching,Guangdong Ocean University,Zhanjiang 524088,China||College of Shipping and Maritime Transport,Guangdong Ocean University,Zhanjiang 524088,China
  • 4. Information System Integration Center,China Mobile Group Shandong Co.,Ltd.,Jinan 250001,China
  • 折叠

摘要

Abstract

Aiming at the problem of limited sensitivity of optical fiber salinity sensors,this paper proposed a high-sensitivity fiber optic Fabry-Perot(Fabry-Perot Interferometer,FPI)salinity sensor based on sparse sampling of a tunable laser.By controlling the sampling interval of the tunable laser to be close to the free spectral range(Free Spectral Range,FSR)of the FPI interferometric cavity,a vernier-like effect was formed in the spectrum.Under sparse sampling conditions,the interference signal generated adjust-able envelope drift in the spectrum,which significantly amplified the refractive index perturbation caused by small salinity changes,thereby enabling high-sensitivity detection of salinity parameters.Experimental results demonstrate that the sensing system achieves a salinity sensitivity of up to 1.525 nm/‰ within the range of 20‰～35‰ salinity,which is approximately 9.24 times higher than that of a single FPI interfer-ometer structure.Compared with the traditional vernier effect method based on a dual-cavity interferome-ter structure,the present sensor does not require any modification to the existing structure and can flexibly control system sensitivity and enhance detection accuracy simply by adjusting the sampling interval of the tunable laser source.The method is simple to implement,highly compatible,and has broad application prospects in the fields of high-performance fiber optic sensing and marine environment monitoring.

关键词

可调谐激光器/稀疏采样/游标效应/法布里-珀罗/光纤盐度传感器

Key words

tunable laser/sparse sampling/vernier effect/Fabry-Perot/fiber optic salinity sensor

分类

数理科学

引用本文复制引用

YANG Yuqiang,CHEN Xianchang,MU Xiaoguang,YU Zhenjie,QIN Jiangbo,HUANG Zhihao,LI Fujiang..基于可调谐激光器稀疏采样的高灵敏度光纤盐度传感器[J].光学精密工程,2025,33(22):3449-3459,11.

基金项目

广东省自然科学基金(No.2023A1515011212,No.2022A1515011603) （No.2023A1515011212,No.2022A1515011603）

光学精密工程

OA北大核心

1004-924X

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