Title :
Multiplexed optical fibre strain sensing using cross-correlation of subcarrier interferometric spectra
Author :
Volanthen, M. ; Geiger, H. ; Dakin, J.P.
Author_Institution :
Optoelectron. Res. Centre, Southampton Univ., UK
fDate :
2/1/1996 12:00:00 AM
Abstract :
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. Pathlength changes are monitored using cross-correlation. A resolution of 35 μm has been obtained over 5 m sensing sections, together with inter-section crosstalk levels below -45 dB
Keywords :
fibre optic sensors; light interferometry; optical correlation; optical crosstalk; optical fibre testing; strain sensors; cross-correlation; inter-section crosstalk; multiple long-length sections; multiplexed optical fibre; pathlength; reflective markers; strain sensing; subcarrier interferometric spectra;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19960187
