An In-Fiber Dual Air-Cavity Fabry-Perot Interferometer for Simultaneous Measurement of Strain and Directional Bend

被引：34

作者：

Ouyang, Yang ^{[1
,2
]}

Guo, Huiyong ^{[1
]}

Ouyang, Xiaowei ^{[1
,2
]}

Zhao, Yujia ^{[3
]}

Zheng, Zhou ^{[1
]}

Zhou, Ciming ^{[1
,2
]}

Zhou, Ai ^{[1
,2
]}

机构：

[1] Wuhan Univ Technol, Natl Engn Lab Fiber Opt Sensing Technol, Wuhan 430074, Peoples R China

[2] Wuhan Univ Technol, Minist Educ, Key Lab Fiber Opt Sensing Technol & Informat Proc, Wuhan 430074, Peoples R China

[3] Harbin Engn Univ, Minist Educ China, Key Lab In Fiber Integrated Opt, Harbin 150001, Peoples R China

来源：

IEEE SENSORS JOURNAL | 2017年 / 17卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Seven-core fiber; dual side-hole; Fabry-Perot interferometer; strain; bend; TEMPERATURE; SENSOR;

D O I：

10.1109/JSEN.2017.2693501

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A simultaneous strain and directional bend sensor based on an in-fiber dual air-cavity Fabry-Perot interferometer (FPI) is presented and demonstrated. The hybrid structure is composed of a fraction of dual side-hole fiber fusion spliced in between a seven-core fiber and a multimode fiber. The bending sensitivities of the two air-cavity FPIs at two opposite most sensitive directions are 120.5 pm/m(-1) and -122 pm/m(-1), 110.4 pm/m(-1), and -121.1 pm/m(-1), respectively. The strain sensitivities of the two FPIs are 1.59 pm/mu epsilon and 1.52 pm/mu epsilon, respectively. By using the method of difference between the two mutually independent air-cavity FPIs, the highest bending sensitivities can be improved to be 242.5 pm/m(-1) and -231.5 pm/m(-1), respectively, and the axial strain effect can be eliminated simultaneously.

引用

页码：3362 / 3366

页数：5

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