Fibre axial strain sensor based on a microwave photonic filter with dual-passband

被引：2

作者：

Wo, Jianghai ^{[1
]}

Zhang, Jin ^{[1
]}

Wang, Anle ^{[1
]}

Du, Pengfei ^{[1
]}

Wang, Yalan ^{[1
]}

Cong, Wenshan ^{[1
]}

Luo, Xiong ^{[1
]}

Xu, Xin ^{[1
]}

Yu, Lan ^{[1
]}

机构：

[1] Wuhan Elect Inst, Microwave Photon Ctr, Wuhan, Hubei, Peoples R China

来源：

JOURNAL OF MODERN OPTICS | 2018年 / 65卷 / 14期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Fibre optics sensors; microwave photonic filter; fibre Bragg grating Fabry-Perot filter; axial strain sensing; TEMPERATURE; INTERFEROMETER; SENSITIVITY;

D O I：

10.1080/09500340.2018.1458914

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A fibre axial strain sensor based on a phase modulated microwave photonics filter (MPF) with dual-passband is proposed and experimentally demonstrated. According to the phase-modulation to intensity-modulation (PM-IM) conversion in the MPF, dual-passband can be generated by utilizing two cascaded fibre Bragg grating Fabry-Perot (FBG-FP) filters. The fibre axial strain will change the wavelength of the FBG-FP, and resulting in the frequency variation in the passband. Thus, with one FBG-FP serving as the sensing element and the other acting as the reference element, a highly sensitive strain sensor can be realized simply by monitoring the frequency difference variation between the two passbands. The result shows that the passband frequency changes linearly in response to the strain with a sensitivity of 1.40x10(8)Hz/epsilon. The sensor reveals the advantages of highly sensitive, small hysteresis and good stability, providing great potential for practical applications.

引用

页码：1737 / 1741

页数：5

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