23 February 2001 FMCW addressing of a fiber Bragg grating sensor array
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Proceedings Volume 4357, Distributed Fiber Optical Sensors and Measuring Networks; (2001) https://doi.org/10.1117/12.417887
Event: Distributed Fiber Optical Sensors and Measuring Networks, 2000, none, Russian Federation
Abstract
We report on the use of a frequency-modulated continuous wave (FMCW) technique 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 3-sensor FMCW multiplexed FBG array of parallel topology and a 6-sensor hybrid FMCW/WDM system were experimentally demonstrated with -30 dB crosstalk between sensors and 2 (mu) (epsilon) resolution in terms of root-mean-square strain value.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter K. C. Chan, Peter K. C. Chan, Wei Jin, Wei Jin, M. Suleyman Demokan, M. Suleyman Demokan, } "FMCW addressing of a fiber Bragg grating sensor array", Proc. SPIE 4357, Distributed Fiber Optical Sensors and Measuring Networks, (23 February 2001); doi: 10.1117/12.417887; https://doi.org/10.1117/12.417887
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