Fibre Bragg grating sensor interrogation using an acousto-optic tunable filter and low-coherence interferometry


We describe how an acousto-optic tunable filter can be used to both demultiplex the signals from multiple fibre Bragg grating sensors and simultaneously provide wide bandwidth signal demodulation in a system using interferometric wavelength shift detection. In an experimental demonstration, the approach provided a noise limited strain resolution of 24.9 n epsilon Hz(-1/ 2) at 15 Hz.

Uncontrolled Keywords: acousto-optic tunable filter, demultiplex, signals, multiple fibre Bragg grating sensors, wide bandwidth signal demodulation, interferometric wavelength shift detection
Publication ISSN: 0957-0233
Last Modified: 23 Oct 2019 11:27
Date Deposited: 25 May 2011 11:27
Published Date: 2007-09
Authors: Norman, D.C.C.
Webb, David J.


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