Fiber-optic temperature sensor based on enhanced Vernier effect

被引：1

作者：

Gao J. ^{[1
,4
]}

Yang Y. ^{[1
,2
,4
]}

Mu X. ^{[3
]}

Zhang Y. ^{[4
]}

Li Y. ^{[4
]}

机构：

[1] Shenzhen Institute, Guangdong Ocean University, Shenzhen

[2] Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching, Guangdong Ocean University, Zhanjiang

[3] College of Mechanical Engineering, Guangdong Ocean University, Zhanjiang

[4] Research Center of Guangdong Smart Oceans Sensor Networks and Equipment Engineering, Guangdong Ocean University, Zhanjiang

来源：

Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2023年 / 31卷 / 24期

关键词：

enhanced vernier effect; Fabry-Perot Interferometer(FPI); optical fiber sensor; Polydimethylsiloxane; Sagnac Interferometer(SI);

D O I：

10.37188/OPE.20233124.3531

中图分类号：

学科分类号：

摘要：

A high-sensitivity fiber temperature sensor based on enhanced Vernier effect is proposed. The proposed sensor consists of a cascaded Fabry-Perot interferometer(FPI)and Sagnac interferometer (SI). The FPI was a PDMS cavity formed by filling polydimethylsiloxane (PDMS) into hollow-core fiber (HCF), and SI was formed by fusing a section of Panda fiber inside a single-mode fiber ring. FPI and SI have opposite temperature responses. With increasing temperature, the interference spectrum of FPI will red-shift, whereas that of SI will blue-shift. Therefore, when FPI and SI are cascaded, an enhanced Vernier effect will be generated, with a temperature sensitivity much greater than FPI or SI alone. The magnification of the enhanced Vernier effect is significantly larger than that of the ordinary Vernier effect. Experimental results show that the sensitivity of the sensor is -57.85 nm/℃ in the temperature range of 36–39 ℃, which is 44.8 and 30.8 times that of FPI and SI alone, respectively. The sensitivity magnifications are 2.56 and 1.66 times those of ordinary Vernier effect, respectively. The sensor has the advantages of high sensitivity, good stability, low preparation cost, and very good application prospects. © 2023 Chinese Academy of Sciences. All rights reserved.

引用

页码：3531 / 3539

页数：8

共 26 条

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