Title :
Combined time and wavelength multiplexing technique of optical fiber grating sensor arrays using commercial OTDR equipment
Author :
Valente, Luiz Carlos Guedes ; Braga, A.M.B. ; Ribeiro, Alexandre Sant Anna ; Regazzi, Rogério Dias ; Ecke, Wolfgang ; Chojetzki, Christoph ; Willsch, R.
Author_Institution :
Dept. of Mech. Eng., Pontificia Univ. Catolica do Rio de Janeiro, Brazil
Abstract :
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.
Keywords :
Bragg gratings; fibre optic sensors; optical time-domain reflectometry; strain sensors; temperature sensors; time division multiplexing; wavelength division multiplexing; Bragg grating sensors; OTDR equipment; optical fiber grating sensor arrays; strain measuring range; strain resolution; temperature measurement; time multiplexing technique; wavelength multiplexing technique; Fiber gratings; Multiplexing equipment; Optical arrays; Optical devices; Optical fiber devices; Optical fiber sensors; Optical fibers; Optical sensors; Sensor arrays; Strain measurement;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2003.810106
