Title :
Fiber Bragg sensors interrogation based on carrier generation by modulating the coupling length of a wavelength-division multiplexer
Author :
Misas, Cesar Jauregui ; Araújo, Francisco Manuel Molita ; Ferreira, L.A. ; Santos, Jose L. ; López-Higuera, José Miguel
Author_Institution :
Cantabria Univ., Santander, Spain
Abstract :
A compact all-fiber interrogation technique for Bragg sensors is presented. It is based on the generation of an electric carrier by modulating the coupling length of a wavelength-division multiplexer (WDM). Theoretical and experimental results are presented when both serrodyne and sinusoidal modulations are considered. It is shown that this technique provides static microstrain resolution in measurement intervals larger than some millistrain.
Keywords :
Bragg gratings; fibre optic sensors; optical fibre couplers; optical modulation; wavelength division multiplexing; WDM; carrier generation; compact all-fiber interrogation technique; coupling length; electric carrier; fiber Bragg sensors interrogation; measurement intervals; millistrain; serrodyne modulation; sinusoidal modulation; static microstrain resolution; wavelength-division multiplexer; Bragg gratings; Optical fiber devices; Optical fiber sensors; Optical filters; Optical interferometry; Optical modulation; Optical sensors; Optical signal processing; Wavelength division multiplexing; Wavelength measurement;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/2944.892614
