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Arbitrary strain profile measurement within fibre gratings using interferometric Fourier transform technique

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4 Author(s)
Ohn, M.M. ; Inst. for Aerosp. Studies, Toronto Univ., Downsview, Ont., Canada ; Huang, S.Y. ; Measures, R.M. ; Chwang, J.

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

Published in:

Electronics Letters  (Volume:33 ,  Issue: 14 )

Date of Publication:

3 Jul 1997

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