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Proceedings Paper

High spatial resolution multiplexing of fiber Bragg gratings using single-arm frequency-shifted interferometry
Author(s): Zeng Xiong; Ciming Zhou; Huiyong Guo; Dian Fan; Yiwen Ou; Yi Liu; Chunran Sun; Li Qian
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Paper Abstract

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 (~5% reflectivity) separated by ~0.1 m were clearly resolved experimentally, sweeping EOM modulation frequency in the range of 2-11 GHz.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103233S (23 April 2017); doi: 10.1117/12.2265331
Show Author Affiliations
Zeng Xiong, Wuhan Univ. of Technology (China)
Ciming Zhou, Wuhan Univ. of Technology (China)
Huiyong Guo, Wuhan Univ. of Technology (China)
Univ. of Toronto (Canada)
Dian Fan, Wuhan Univ. of Technology (China)
Yiwen Ou, Wuhan Univ. of Technology (China)
Hubei Univ. of Technology (China)
Yi Liu, Univ. of Toronto (Canada)
Chunran Sun, Univ. of Toronto (Canada)
Li Qian, Univ. of Toronto (Canada)

Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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