A Fabry-Perot interferometer strain sensor composed of a rounded rectangular air cavity with a thin wall for high sensitivity and interference contrast

被引：15

作者：

Li, Qiao ^{[1
]}

Wang, Jianxin ^{[1
]}

Mu, Haiwei ^{[1
]}

Lv, Jingwei ^{[1
]}

Yang, Lin ^{[1
]}

Shi, Ying ^{[2
]}

Yi, Zao ^{[3
]}

Chu, Paul K. ^{[4
,5
]}

Liu, Qiang ^{[1
]}

Liu, Chao ^{[1
]}

机构：

[1] Northeast Petr Univ, Sch Phys & Elect Engn, Daqing 163318, Peoples R China

[2] Northeast Petr Univ, Inst Unconventional Oil & Gas, Daqing 163318, Peoples R China

[3] Southwest Univ Sci & Technol, Joint Lab Extreme Condit Matter Properties, Mianyang 621010, Peoples R China

[4] City Univ Hong Kong, Dept Phys, Dept Mat Sci & Engn, Dept Biomed Engn, Tat Chee Ave, Hong Kong, Peoples R China

[5] City Univ Hong Kong, Dept Biomed Engn, Hong Kong, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2023年 / 527卷

关键词：

Fabry-P?rot interferometer; Air cavity; Optical fiber sensor; Strain sensitivity; Interference contrast; OPTICAL-FIBER;

D O I：

10.1016/j.optcom.2022.128920

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A Fabry-Perot interferometer (FPI) strain sensor with high sensitivity and interference contrast is designed and fabricated by a simple, cost effective, and safe process which can be scaled up for commercial production. The excellent strain sensitivity of 8 pm/mu e and interference contrast of 25 dB stem from the special structure with the unique air cavity, small wall thickness, and excellent reflection surface of the air cavity. The strain -temperature cross-sensitivity of the sensor is only 0.59 mu e/degrees C in the temperature range of 20-80 degrees C. The sensor has large potential in applications such as strain sensing.

引用

页数：6

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