Magnetic Field Sensor Based on Magnetic Fluid Selectively Infilling Photonic Crystal Fibers

Author

Hailiang Chen ; Shuguang Li ; Jianshe Li ; Zhenkai Fan

Author_Institution

Key Lab. of Metastable Mater. Sci. & Technol., Yanshan Univ., Qinhuangdao, China

Volume

27

Issue

7

fYear

2015

fDate

April1, 1 2015

Firstpage

717

Lastpage

720

Abstract

Magnetic field sensor based on magnetic fluid selectively infilling photonic crystal fibers is designed and analyzed by the finite-element method. One cladding air hole is infiltrated with magnetic fluid and works as a defect core. As the phase matched condition is satisfied, the lights in transferring core couple to the defect core and the confinement losses of core modes experience an abrupt increase. The sensitivity and figure of merit can reach to 456.1 pm/Oe, 0.408 Oe^-1 for $x$ -polarized direction and 542.9 pm/Oe, 0.169 Oe^-1 for $y$ -polarized direction, respectively. The designed magnetic fluid selectively infilling photonic crystal fibers which show small volume, high sensitivity, and figure of merit are suitable for magnetic field sensor.

Keywords

fibre optic sensors; finite element analysis; holey fibres; magnetic field measurement; magnetic fluids; magnetic sensors; optical design techniques; optical fibre cladding; optical fibre losses; optical fibre polarisation; optical phase matching; photonic crystals; cladding air hole; confinement losses; core modes; defect core; finite-element method; magnetic field sensor; magnetic fluid selectively infilling photonic crystal fibers; phase matched condition; x-polarized direction; y-polarized direction; Magnetic cores; Magnetic resonance; Perpendicular magnetic anisotropy; Photonic crystals; Refractive index; Sensitivity; Fiber optics sensors; Magnetic fluid; Photonic crystal fibers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2015.2390291

Filename

7005447