Volanthen, M., Geiger, H. and Dakin, J.P.
Multiplexed optical fibre strain sensing by cross-correlation of subcarrier interferometric spectra
Electronics Letters, 32, (3), . (doi:10.1049/el:19960187).
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A novel technique for evaluating strain in multiple long-length sections of optical fibre is described. Sections defined by reflective markers are interrogated with subcarrier interferometry. Path-length changes are monitored using cross-correlation. A resolution of 35µm has been obtained over 5m sensing sections, together with inter-section crosstalk levels below -45dB.
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