Corrugated long-period fiber gratings as strain, torsion, and bending sensors
Resource
Journal of Lightwave Technology 19 (8): 1159-1168
Journal
Journal of Lightwave Technology
Journal Volume
19
Journal Issue
8
Pages
1159-1168
Date Issued
2001-08
Author(s)
Abstract
We present a novel corrugated long-period fiber grating whose transmission spectra are highly sensitive to the applied tensile strain, torsion, and bending due to the periodical index modulation created and changed by these mechanic forces. The induced index modulation can also be experimentally characterized by using a built-in fiber Bragg grating (FBG). The long period fiber gratings possess the following unique properties when used as sensors. As a tensile strain sensor, its resonance loss varies but resonance wavelength remains stable. As a torsion sensor, the wavelength varies with the applied twist rate. As a bending sensor, the cladding-mode resonance grows with the bending curvature.
Type
journal article
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