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Proceedings Paper

An EMD-based filtering algorithm for the long period fiber grating sensing
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Paper Abstract

In this work, we employed the Empirical mode decomposition (EMD) algorithm into the demodulation spectrum of the long period fiber grating sensing experiment. After data processing by the EMD-based filtering algorithm, the disordered noise of the fiber Bragg fiber grating (LPFG)’s spectrum caused by the laser source and mode coupling can be effectively eliminated so that the single valley wavelength of LPG can be much more precisely located. As a consequence, based on the proposed algorithm, the related sensitivity of refractive index solution detection can be reached 11 nm/RIU, 18 nm/RIU, 61.3 nm/RIU and 241 nm/RIU in 1.33-1.36, 1.37-1.39, 1.40-1.43, and 1.43-1.45 refractive index region, respectively.

Paper Details

Date Published: 12 March 2020
PDF: 8 pages
Proc. SPIE 11436, 2019 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 1143607 (12 March 2020); doi: 10.1117/12.2542100
Show Author Affiliations
Zhao Zhang, Tianjin Optical Fiber Sensing Engineering Ctr. (China)
Tianjin Univ. (China)
Kun Liu, Tianjin Optical Fiber Sensing Engineering Ctr. (China)
Tianjin Univ. (China)
Junfeng Jiang, Tianjin Optical Fiber Sensing Engineering Ctr. (China)
Tianjin Univ. (China)
Pengxiang Chang, Tianjin Optical Fiber Sensing Engineering Ctr. (China)
Tianjin Univ. (China)
Jinying Ma, Tianjin Optical Fiber Sensing Engineering Ctr. (China)
Tianjin Univ. (China)
Jiahang Zhang, Tianjin Optical Fiber Sensing Engineering Ctr. (China)
Tianjin Univ. (China)
Tiegen Liu, Tianjin Optical Fiber Sensing Engineering Ctr. (China)
Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 11436:
2019 International Conference on Optical Instruments and Technology: Optical Sensors and Applications
Xuping Zhang; Hai Xiao, Editor(s)

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