A High-sensitivity strain sensor based on an Unsymmetrical air-microbubble Fabry-Perot interferometer with an ultrathin wall

被引：26

作者：

Cai, Lu ^{[1
,2
]}

Wang, Jin ^{[1
]}

Chen, Maoqing ^{[1
,2
]}

Ai, Xin ^{[1
]}

机构：

[1] Northeastern Univ, Coll Informat Sci & Engn, Shenyang, Peoples R China

[2] Hebei Key Lab Micronano Precis Opt Sensing & Meas, Qinhuangdao, Hebei, Peoples R China

来源：

MEASUREMENT | 2021年 / 181卷

基金：

中国国家自然科学基金;

关键词：

Air microbubble; Strain sensor; Optical fiber sensor; FIBER; TEMPERATURE; CAVITY;

D O I：

10.1016/j.measurement.2021.109651

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A high-sensitivity, low-cost, ultrathin microbubble structure based on an Unsymmetrical air-microbubble Fabry-Perot interferometer (UAFPI) is proposed. The UAFPI, which has an ultrathin wall of similar to 6 mu m, is constructed by splicing chemically-etched erbium-doped fiber (EDF) to form an air microbubble and applying a taper to one side of the air microbubble. Compared with the air-microbubble Fabry-P ' erot interferometer (AFPI), the UAFPI has a high strain sensitivity of 10.15 pm/mu epsilon, which is approximately three times higher than that of the AFPI, and a low-temperature sensitivity of 2.4 pm/degrees C in the range of 25-80 degrees C. The proposed sensor has several benefits, including high strain sensitivity, low-temperature sensitivity, a simple fabrication process, and low cost. Therefore, such a UAFPI-based strain sensor has broad prospects for mass production and practical applications.

引用

页数：7

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