Title :
Arbitrary strain profile measurement within fibre gratings using interferometric Fourier transform technique
Author :
Ohn, M.M. ; Huang, S.Y. ; Measures, R.M. ; Chwang, J.
Author_Institution :
Inst. for Aerosp. Studies, Toronto Univ., Downsview, Ont., Canada
fDate :
7/3/1997 12:00:00 AM
Abstract :
An interferometric Fourier transform technique of measuring arbitrary strain profiles within intra-core fibre Bragg gratings is described and demonstrated. Using an ~86 mm long grating sensor, measurement of the strain field along a non-uniform cross-section cantilever beam was made. A theoretical strain accuracy of ~25 με is possible with an achieved spatial accuracy of 2.58 mm
Keywords :
Fourier transform optics; diffraction gratings; light interferometry; optical fibre testing; strain measurement; fibre gratings; grating sensor; interferometric Fourier transform technique; intra-core fibre Bragg gratings; nonuniform cross-section cantilever beam; strain field; strain profile measurement;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19970850
