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|Title:||FMCW multiplexing of fiber Bragg grating sensors|
|Authors:||Chan, Peter K. C.|
|Subjects:||Fiber Bragg grating sensors|
Frequency-modulated continuous wave
Optical fiber sensors
|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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|Appears in Collections:||EE Journal/Magazine Articles|
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