Open AccessTemperature-insensitive simultaneous rotation and displacement (bending) sensor based on tilted fiber Bragg grating
Author(s) -
Piotr Kisała,
Damian Harasim,
Janusz Mroczka
Publication year - 2016
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.24.029922
Subject(s) - fiber bragg grating , optics , materials science , bending , rotation (mathematics) , bend radius , fiber optic sensor , displacement (psychology) , optical fiber , phosfos , grating , graded index fiber , fiber , optoelectronics , physics , composite material , psychology , geometry , mathematics , psychotherapist
In this paper, we present a method for the simultaneous measurement of rotation and displacement or rotation and bending using single tilted fiber Bragg grating (TFBG). The insensitivity of the proposed system to temperature changes and the stretching direction of the fiber section in the sensing structure have been demonstrated. The experimentally determined sensitivities for rotation, displacement and bending are as follows: -0.0018 1/deg., 0.0054 nm/mm, and -0.055 1/mm over the measurement ranges of approximately 25-80 degrees, 34-74 mm, and 26.4-20 mm, respectively. The presented measurement system is versatile due to the ability to tune the measurement range by changing the fiber-loop radius.