Title :
An FBG sensing system utilizing both WDM and a novel harmonic division scheme
Author_Institution :
Sch. of Electr. Eng., Univ. of New South Wales, NSW, Australia
Abstract :
A scheme for expanding the channel count of a fiber Bragg grating (FBG) strain sensor system is proposed. The scheme uses gratings with an inscribed carrier frequency and is completely compatible with existing wavelength-division multiplexing (WDM) and time-division multiplexing (TDM) architectures. Experimental simulations based on the model presented show the successful extension of an eight-channel WDM architecture to a 7WDM-by-8Harmonic-Domain architecture, having a flat error profile of /spl sim/2.9 /spl mu//spl epsi/ at a sampling rate of 20 kHz and an update rate of 1.3 Hz.
Keywords :
Bragg gratings; fibre optic sensors; optical communication equipment; strain sensors; telecommunication channels; time division multiplexing; wavelength division multiplexing; WDM; channel count; fiber Bragg grating strain sensor; harmonic division; time division multiplexing; wavelength division multiplexing; Bragg gratings; Capacitive sensors; Fiber gratings; Large-scale systems; Monitoring; Optical crosstalk; Optical sensors; Sensor systems; Time division multiplexing; Wavelength division multiplexing; Fourier transforms; gratings; harmonic analysis; optical fiber sensors;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2004.838816
