Simultaneous Measurement of Temperature and Pressure Based on Fabry-Perot Interferometry for Marine Monitoring

被引：19

作者：

Zhang, Shengqi ^{[1
]}

Mei, Yongchang ^{[1
]}

Xia, Titi ^{[1
]}

Cao, Zihan ^{[1
]}

Liu, Zhengyong ^{[1
,2
]}

Li, Zhaohui ^{[1
,2
]}

机构：

[1] Sun Yat Sen Univ, Sch Elect & Informat Technol, Guangdong Prov Key Lab Optoelect Informat Proc Ch, Guangzhou 510275, Peoples R China

[2] Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519082, Peoples R China

来源：

SENSORS | 2022年 / 22卷 / 13期

基金：

中国国家自然科学基金;

关键词：

fiber-optic sensor; Fabry-Perot interferometer; FBG; temperature and pressure sensing; marine monitoring; FIBER;

D O I：

10.3390/s22134979

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The temperature and pressure of seawater are of great importance to investigate the environmental evolution for the research of ocean science. With this regard, we proposed and experimentally demonstrated a seawater temperature and pressure sensor realized by a polyimide (PI) tube-based Fabry-Perot interferometer (FPI) together with a fiber Bragg grating (FBG). Benefiting from the higher thermo-optical coefficient and larger elasticity of polymer than the fused silica fiber, the sensitivity of the sensor is largely improved. The FBG is used to compensate the cross effect of the temperature. The measured temperature and pressure sensitivities of the sensor are 18.910 nm/degrees C and -35.605 nm/MPa, respectively. Furthermore, the temperature and pressure information measured by the sensor can be achieved simultaneously using the sensitivity matrix method. In addition, the proposed sensor has advantages of easy fabrication, compact size, as well as capability of multiplexing and long-distance measurement, making it competitive and promising during the marine monitoring.

引用

页数：10