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Title: FMCW multiplexing of fiber Bragg grating sensors
Authors: Chan, Peter K. C.
Jin, Wei
Demokan, Suleyman
Subjects: Fiber Bragg grating sensors
Frequency-modulated continuous wave
Optical fiber sensors
Strain measurements
Issue Date: Sep-2000
Publisher: IEEE
Source: IEEE journal of selected topics in quantum electronics, Sept./Oct. 2000, v. 6, no. 5, p. 756-763
Abstract: We report on the use of frequency-modulated continuous wave (FMCW) techniques for multiplexing fiber Bragg grating (FBG) sensors. This technique is based on the modulation of light intensity from a broadband source by a linear swept-frequency RF carrier. Signals from the FBG sensors located at different positions in an array are separated in frequency domain and demodulated using a tunable optical filter. The potential and limitation of the technique are discussed. A three-sensor FMCW multiplexed FBG array of parallel topology and a six-sensor hybrid FMCW/WDM system were experimentally demonstrated with -30 dB crosstalk between sensors and 2 µε resolution in terms of root mean square (RMS) strain value.
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Type: Journal/Magazine Article
DOI: 10.1109/2944.892615
ISSN: 1077260X
Appears in Collections:EE Journal/Magazine Articles

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