Title :
Long period fibre gratings for structural bend sensing
Author :
Patrick, H.J. ; Chang, C.C. ; Vohra, S.T.
Author_Institution :
Opt. Techniques Branch, Naval Res. Lab., Washington, DC, USA
fDate :
9/3/1998 12:00:00 AM
Abstract :
The authors examine the changes in wavelength and attenuation of long period fibre gratings subjected to bends with curvatures from 0 to 4.4 m-1. The wavelength change with curvature is nonlinear, with a projected minimum detectable curvature change of 2×10-3 m-1. The magnitude of the bend-induced wavelength shift depends on the rotation of the cylindrical fibre relative to the bending plane
Keywords :
bending; diffraction gratings; fibre optic sensors; attenuation; curvature; long period fibre grating; structural bend sensing; wavelength shift;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19981237
