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

fYear

1995

fDate

11/7/1995 12:00:00 AM

Firstpage

42370

Lastpage

42375

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; optical fibre dispersion; remote sensing; strain measurement; strain sensors; 0 to 40 C; Mach-Zehnder interferometer; broadband interferometry; dispersion changes; dispersive Fourier transform spectroscopy; group delay; linear signal recovery algorithm; low-coherence interferometry; matrix transformation; optical fibre interferometry; remote interrogation of sensors; simultaneous strain and temperature measurement; tandem interferometry; temperature-insensitive strain measurement;

fLanguage

English

Publisher

iet

Conference_Titel

Progress in Fibre Optic Sensors and Their Applications, IEE Colloquium on

Conference_Location

London

Type

conf

DOI

10.1049/ic:19951209

Filename

499534