Materials, Photonic Devices, and Sensors

Dynamic fiber Bragg grating sensor array with increased wavelength-division multiplexing density and low crosstalk

[+] Author Affiliations
Faxiang Zhang, Chang Wang, Shaodong Jiang, Xiaolei Zhang, Zhihui Sun, Jiasheng Ni

Laser Institute of Shandong Academy of Science, Ji’nan Research Center, Ji’nan, China

Gangding Peng

Laser Institute of Shandong Academy of Science, Ji’nan Research Center, Ji’nan, China

University of New South Wales, School of Electrical Engineering and Telecommunications, Australia

Opt. Eng. 56(3), 037101 (Mar 03, 2017). doi:10.1117/1.OE.56.3.037101
History: Received December 22, 2016; Accepted February 16, 2017
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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 7×104  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.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Faxiang Zhang ; Chang Wang ; Shaodong Jiang ; Xiaolei Zhang ; Zhihui Sun, et al.
"Dynamic fiber Bragg grating sensor array with increased wavelength-division multiplexing density and low crosstalk", Opt. Eng. 56(3), 037101 (Mar 03, 2017). ; http://dx.doi.org/10.1117/1.OE.56.3.037101


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