Open AccessVector bending sensor based on an edge-core cladding-type fiber Bragg grating
Author(s) -
Fengyi Chen,
Xingyong Li,
Weijia Bao,
Ruohui Wang,
Xueguang Qiao
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.441761
Subject(s) - optics , materials science , cladding (metalworking) , fiber bragg grating , femtosecond , photonic crystal fiber , core (optical fiber) , laser , optical fiber , physics , metallurgy
A two-dimensional vector bending sensor that is both compact and simple is proposed and demonstrated, based on an edge-core cladding-type fiber Bragg grating (ECLFBG) inscribed in an edge-core. The ECLFBG is written parallel to the edge-core using a femtosecond laser point-by-point technique. The reflection spectrum of this ECLFBG varies significantly depending on the magnitude and direction of the fiber's bend. Combining the trend and sensitivity of the wavelength shift and reflection intensity variations of the ECLFBG, the bending magnitude and direction can be measured simultaneously.