Open AccessMulti-mode interferometer-based twist sensor with low temperature sensitivity employing square coreless fibers
Author(s) -
Binbin Song,
Yinping Miao,
Wei Lin,
Hao Zhang,
Jixuan Wu,
Bo Liu
Publication year - 2013
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.21.026806
Subject(s) - optics , materials science , interferometry , multi mode optical fiber , fiber optic sensor , twist , single mode optical fiber , optical fiber , polarization maintaining optical fiber , graded index fiber , photonic crystal fiber , fusion splicing , dispersion shifted fiber , wavelength , sensitivity (control systems) , fiber , physics , electronic engineering , geometry , mathematics , composite material , engineering
An all-fiber twist sensor based on multimode interferometer (MMI) has been proposed and fabricated by splicing both ends of a section of square no-core fiber (NCF) with a single mode fiber. We have investigated the transmission spectral characteristics of the square fiber under different applied twisting angles. Within a torsion angle range of -360°~360°, the wavelength and transmission sensitivities are 1.28615 nm/(rad × m(-1)) and 0.11863%/ (rad × m(-1)), respectively. Moreover due to the trivial thermal expansion coefficient of pure silica fiber, the proposed twist sensor has a low temperature sensitivity, which is desirable to solve the temperature cross sensitivity.