Open Access3D printed long period gratings and their applications as high sensitivity shear-strain and torsion sensors
Author(s) -
Ricardo Oliveira,
Rogério Nogueira,
Lúcia Bilro
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.427387
Subject(s) - materials science , torsion (gastropod) , optics , ranging , demodulation , fiber bragg grating , wavelength , grating , fiber optic sensor , diffraction grating , optoelectronics , optical fiber , physics , telecommunications , medicine , channel (broadcasting) , surgery , computer science
In this work we demonstrate the capability to measure shear-strain and torsion loads by bonding an optical fiber to a 3D printed periodic grooved plate. The device acts as a long period grating where the resonances show loss tunability ranging from ∼0 up to ∼20 dB, achieving sensitivities values for the dip transmission ratio as function of the load of 0.12 /mε and 0.21/deg, for shear-strain and torsion loads ranging from 0-∼8 mε and 1-∼4 deg, respectively. The low wavelength drift allowed us to operate the sensor through intensity demodulation techniques, showing good tracking performance of external stimuli.