期刊
OPTICAL ENGINEERING
卷 56, 期 3, 页码 -出版社
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.OE.56.3.037101
关键词
wavelength-division multiplexed; fiber Bragg grating; interferometric detection; crosstalk; array
类别
资金
- NSFC [61605102]
- Science and Technology Development Plan of Shandong Province [2014GGX103005, 2014GSF120017]
- Major Science and Technology Program of Shandong Province [2015JMRH0319]
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 similar to 7 x 10(-4) pm/root 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. (C) 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
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