3 March 2017 Dynamic fiber Bragg grating sensor array with increased wavelength-division multiplexing density and low crosstalk
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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 × 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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Faxiang Zhang, Faxiang Zhang, Chang Wang, Chang Wang, Shaodong Jiang, Shaodong Jiang, Xiaolei Zhang, Xiaolei Zhang, Zhihui Sun, Zhihui Sun, Jiasheng Ni, Jiasheng Ni, Gangding Peng, Gangding Peng, } "Dynamic fiber Bragg grating sensor array with increased wavelength-division multiplexing density and low crosstalk," Optical Engineering 56(3), 037101 (3 March 2017). https://doi.org/10.1117/1.OE.56.3.037101 . Submission: Received: 22 December 2016; Accepted: 16 February 2017
Received: 22 December 2016; Accepted: 16 February 2017; Published: 3 March 2017
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