Open AccessAll fiber magnetic field sensor with Ferrofluid-filled tapered microstructured optical fiber interferometer
Author(s) -
Ming Deng,
Can Huang,
Danhui Liu,
Wei Jin,
Tao Zhu
Publication year - 2015
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.23.020668
Subject(s) - materials science , ferrofluid , optical fiber , optics , photonic crystal fiber , interferometry , fiber optic sensor , magnetic field , cladding (metalworking) , microstructured optical fiber , fusion splicing , single mode optical fiber , optoelectronics , polarization maintaining optical fiber , physics , quantum mechanics , metallurgy
An ultra-compact optical fiber magnetic field sensor based on a microstructured optical fiber (MOF) modal interference and ferrofluid (FF) has been proposed and experimentally demonstrated. The magnetic field sensor was fabricated by splicing a tapered germanium-doped index guided MOF with six big holes injected with FF to two conventional single-mode fibers. The transmission spectra of the proposed sensor under different magnetic field intensities have been measured and theoretically analyzed. Due to an efficient interaction between the magnetic nanoparticles in FF and the excited cladding mode, the magnetic field sensitivity reaches up to117.9pm/mT with a linear range from 0mT to 30mT. Moreover, the fabrication process of the proposed sensor is simple, easy and cost-effective. Therefore, it will be a promising candidate for military, aviation industry, and biomedical applications, especially, for the applications where the space is limited.