Multipoint strain sensing system based on fiber loop ringdown and frequency-shifted interferometry

被引：0

作者：

Chen, Zehao ^{[1
,2
]}

Cheng, Chunfu ^{[1
,2
]}

Ou, Yiwen ^{[1
,2
]}

Yang, Zhangyong ^{[1
,2
]}

Chen, Jiaxuan ^{[1
,2
]}

Lv, Hui ^{[1
,2
]}

机构：

[1] Hubei Univ Technol, Hubei Collaborat Innovat Ctr High Efficiency Util, Wuhan 430068, Peoples R China

[2] Hubei Univ Technol, Sch Sci, Wuhan 430068, Peoples R China

来源：

AOPC 2019: OPTICAL SENSING AND IMAGING TECHNOLOGY | 2019年 / 11338卷

基金：

对外科技合作项目（国际科技项目）;

关键词：

Fiber loop ringdown; frequency-shifted interferometry; strain sensor; multimode fiber; DOWN SPECTROSCOPY; TEMPERATURE;

D O I：

10.1117/12.2541914

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We proposed a novel multipoint sensing method for large strain measurement combined fiber loop ringdown (FLRD) and frequency-shifted interferometry (FSI). Using this method, a biconical tapered multimode fiber was used as a sensor head for large strain measurement and a serial dual-point strain sensing system was experimentally validated. By measuring the ringdown distance of each FSI-FLRD strain sensor, the strain and position of each sensor can be simultaneously obtained. Using such strain sensors, the strain sensitivities of 0.51337 km(-1)center dot m epsilon(-1) and 0.8667 km(-1)center dot m epsilon(-1) within a large measurement range of up to 6 me were achieved.

引用

页数：6

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