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Novel nested anti-resonant fiber based magnetic fluids sensor: Performance and bending effects inspection

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Abstract The negative curvature hollow-core (NC-HC) fibers got the potential to be extensively used, especially, in sensing applications as it facilitates the liquid infiltration into the wide hollow region compared… Click to show full abstract

Abstract The negative curvature hollow-core (NC-HC) fibers got the potential to be extensively used, especially, in sensing applications as it facilitates the liquid infiltration into the wide hollow region compared to the narrow air holes of the conventional photonic crystal fibers (PCFs). In this work, an NC-HC fiber which consists of five nested rings is proposed to be used as the magnetic field sensor. The fiber material is pure silica and it is proposed to be filled with magnetic fluid, whose refractive index (RI) varies with the surrounding magnetic field strength change. The guiding properties of the sensor are examined by COMSOL multiphysics software and sensing performance is carried out theoretically in terms of confinement loss and transmittance spectrum. The proposed fiber exhibits very low confinement loss as well as high sensitivity response of 2 nm/Oe to 6.8 nm/Oe for the magnetic field strength variation from 100 Oe to 400 Oe. Moreover, it is highly expected that the proposed sensor can be effectively used in generic parameters, such as displacement, strain, liquid level, temperature and magnetic sensor due to its liquid infiltration feasibility, low loss, and high sensitivity.

Keywords: performance; novel nested; magnetic field; nested anti; sensor; fiber

Journal Title: Journal of Magnetism and Magnetic Materials
Year Published: 2021

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