Title :
High-resolution fibre-grating based strain sensor with interferometric wavelength-shift detection
Author :
Kersey, A.D. ; Berkoff, T.A. ; Morey, W.W.
Author_Institution :
Naval Res. Labs., Washington, DC, USA
Abstract :
A technique for the detection of dynamic strain induced wavelength shifts in fibre Bragg grating sensors is reported that is based on an unbalanced-interferometer wavelength discriminator, which is capable of subnanostrain resolution (0.6 n in / square root (Hz) at 500 Hz) sensing.
Keywords :
diffraction gratings; fibre optic sensors; light interferometers; strain measurement; Bragg grating sensors; dynamic strain induced wavelength shifts; fibre-grating based strain sensor; interferometric wavelength-shift detection; subnanostrain resolution; unbalanced-interferometer wavelength discriminator;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920146
