Open AccessNegative curvature hollow core fiber sensor for the measurement of strain and temperature
Author(s) -
Marta S. Ferreira,
Jörg Bierlich,
Jens Kobelke,
João Pinto,
Katrin Wondraczek
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.412532
Subject(s) - optics , interferometry , astronomical interferometer , curvature , core (optical fiber) , fiber optic sensor , optical fiber , michelson interferometer , materials science , temperature measurement , fiber , single mode optical fiber , physics , geometry , mathematics , quantum mechanics , composite material
Three different types of strain and temperature sensors based on negative curvature hollow core fiber (NCHCF) are proposed. Each sensor is produced by splicing a small section of the NCHCF between two sections of single mode fiber. Different types of interferometers are obtained simply by changing the splicing conditions. The first sensor consists on a single Fabry-Perot interferometer (FPI). The remaining two configurations are attained with the same sensing structure, depending on its position in relation to the interrogation setup. Thus, a double FPI or a hybrid sensor, the latter being composed by an FPI and a Michelson interferometer, are formed. The inline sensors are of submillimeter size, thus enabling nearly punctual measurements.