High spatial resolution multiplexing of fiber Bragg gratings using single-arm frequency-shifted interferometry

被引：1

作者：

Xiong, Zeng ^{[1
]}

Zhou, Ciming ^{[1
]}

Guo, Huiyong ^{[1
,3
]}

Fan, Dian ^{[1
]}

Ou, Yiwen ^{[1
,2
]}

Liu, Yi ^{[3
]}

Sun, Chunran ^{[3
]}

Qian, Li ^{[3
]}

机构：

[1] Wuhan Univ Technol, Natl Engn Lab Fiber Opt Sensing Technol, Wuhan 430070, Hubei, Peoples R China

[2] Hubei Univ Technol, Sch Sci, Wuhan 430068, Hubei, Peoples R China

[3] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada

来源：

2017 25TH INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS (OFS) | 2017年 / 10323卷

基金：

中国国家自然科学基金;

关键词：

Fiber Bragg gratings (FBGs); multiplexing; single-arm frequency-shifted interferometry; fiber optics sensors; SENSORS;

D O I：

10.1117/12.2265331

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：

We demonstrate a high spatial resolution multiplexing scheme for fiber Bragg grating (FBG) sensors based on single-arm frequency-shifted interferometry (SA-FSI). The SA-FSI system uses an incoherent broadband source, a slow detector, and an electro-optic modulator (EOM). By sweeping the frequency of EOM and taking the fast Fourier transform (FFT) of the interference signal, we resolved the locations of FBGs distributed both in parallel and in series along fiber links despite their reflection spectral overlap. Eighteen weak FBGs (similar to 5% reflectivity) separated by similar to 0.1 m were clearly resolved experimentally, sweeping EOM modulation frequency in the range of 2-11 GHz.

引用

页数：4

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