Title :
Temperature-insensitive strain measurement by broad-band interferometry
Author :
Luke, D.G. ; McBride, R. ; Flavin, D.A. ; Burnett, J.G. ; Jones, J.D.C.
Author_Institution :
Dept. of Phys., Heriot-Watt Univ., Edinburgh, UK
Abstract :
We report a technique for temperature-insensitive strain measurement by broad-band interferometry. Changes in group delay and dispersion in a Mach-Zehnder interferometer are measured by dispersive Fourier transform spectroscopy (DFTS). These measurements give values for strain and temperature via a well-conditioned matrix transformation, so that strain measurements are independent of temperature change. The technique can be used for remote interrogation of sensors by tandem interferometry
Keywords :
Fourier transform spectroscopy; Mach-Zehnder interferometers; fibre optic sensors; light interferometry; strain measurement; strain sensors; 0 to 40 C; Mach-Zehnder interferometer; broadband interferometry; dispersive Fourier transform spectroscopy; group delay; group dispersion; matrix transformation; optical fibre sensing; remote interrogation of sensors; simultaneous measurement; tandem interferometry; temperature-insensitive strain measurement;
Conference_Titel :
Optical Techniques for Structural Monitoring, IEE Colloquium on
Conference_Location :
London
DOI :
10.1049/ic:19950587
