A torsion sensor made of a corrugated long period fibre grating
Resource
Measurement Science and Technology 12: 793–799
Journal
Measurement Science and Technology
Journal Volume
12
Journal Issue
7
Pages
793-799
Date Issued
2001
Date
2001
Author(s)
Abstract
Based on the photoelastic effect, the strain distribution within a corrugated long period fibre grating (LPFG) subjected to tensile stress and twisting will cause a periodic index variation, which may result in resonant couplings between fibre core and cladding modes. The resonance wavelength corresponding to the peak loss is directly sensitive to the torsional angle per unit length; thus a novel torsion sensor can be made from the corrugated long period fibre grating. We also present a phenomenological theory based on the scattering matrix formalism to qualitatively explain the mode coupling behaviour in the corrugated grating.
Subjects
Corrugated structure; Fibre sensor; Mode coupling; Strain; Torsion grating
Other Subjects
Fiber Bragg gratings; Photoelasticity; Refractive index; Strain measurement; Tensile stress; Torsional stress; Corrugated gratings; Fiber optic sensors; optical fiber; sensor; Strain; Torsion
Type
journal article
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