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Combined time and wavelength multiplexing technique of optical fiber grating sensor arrays using commercial OTDR equipment

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7 Author(s)
L. C. G. Valente ; Dept. of Mech. Eng., Pontificia Univ. Catolica do Rio de Janeiro, Brazil ; A. M. B. Braga ; A. S. Ribeiro ; R. D. Regazzi
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The use of a commercial optical time domain reflectometry device for simultaneous wavelength and time domain multiplexing of fiber-optic Bragg grating sensors is proposed and demonstrated. The realization of such systems provides an inexpensive way of interrogating several hundreds of sensors in a single fiber. Strain resolution of 30 μm/m over a strain measuring range of 0.5% was obtained.

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IEEE Sensors Journal  (Volume:3 ,  Issue: 1 )