Abstract
A high sensitivity magnetic fluid (MF) filled side-hole fiber
magnetic field sensor based on surface plasmon resonance (SPR) is designed
and investigated. Within the side-hole fiber, the water-based MF is
injected into the two side holes, and both of the holes are coated with
gold to realize the measurement of the magnetic field by using the SPR
effect. The refractive index of the MF changes with different external
magnetic fields, resulting in the resonant wavelength moving to other
wavelengths. Furthermore, when the external magnetic field increases from
30 to 210.9 Oe, the magnetic field sensitivity can reach to 1.063
nm/Oe.
© 2016 Chinese Laser Press
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