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Optical Engineering

Dynamic fiber Bragg grating sensor array with increased wavelength-division multiplexing density and low crosstalk
Author(s): Faxiang Zhang; Chang Wang; Shaodong Jiang; Xiaolei Zhang; Zhihui Sun; Jiasheng Ni; Gangding Peng
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Paper Abstract

This paper describes a dense wavelength-division multiplexing scheme with low crosstalk for fiber Bragg grating (FBG) sensors based on interferometric detection. The scheme uses a 100-GHz spacing dense wavelength-division multiplexer with two-level optical filters to separate the returned wavelengths from FBG sensor array, enabling a high-resolution interferometric dynamic wavelength demodulation for each sensor with narrow spacing. An array with three gratings was demonstrated, and a dynamic wavelength resolution of 7 × 10 4    pm / Hz was tested, with a bandwidth of 1 Hz to 1 kHz for each sensor. The FBGs have an operating range approaching 0.6 nm with a crosstalk level below 80    dB . The multiplexing scheme demonstrates the potential to address up to 50 FBG sensors through a single fiber with a 40-nm bandwidth optical source.

Paper Details

Date Published: 3 March 2017
PDF: 5 pages
Opt. Eng. 56(3) 037101 doi: 10.1117/1.OE.56.3.037101
Published in: Optical Engineering Volume 56, Issue 3
Show Author Affiliations
Faxiang Zhang, Laser Institute of Shandong Academy of Science (China)
Chang Wang, Laser Institute of Shandong Academy of Sciences (China)
Shaodong Jiang, Laser Institute of Shandong Academy of Sciences (China)
Xiaolei Zhang, Laser Institute of Shandong Academy of Sciences (China)
Zhihui Sun, Laser Institute of Shandong Academy of Sciences (China)
Jiasheng Ni, Laser Institute of Shandong Academy of Sciences (China)
Gangding Peng, Laser Institute of Shandong Academy of Sciences (China)
The Univ. of New South Wales (Australia)


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