Abstract

Magnetic field measurement has become an essential part in many industrial, scientific and defence projects today. During the last few years, attention in optical fiber based magnetic field sensors [1] has widely increased because of their flexibility, remote and multiplexed operation. However, the main challenging task for designing such sensors is to choose proper magnetic probe material. For decades, optical fiber coated with ferrite nanoparticle has found wide application for sensing of small magnetic field. Spinel type nickel ferrites with 2–3 atomic % of Co doping were reported to have exceptionally high magnetic properties [2]. In this work, we have prepared Cobalt-doped nickel ferrite (Ni_0.97Co_0.03Fe₂O₄) sample and developed an experimental prototype set-up for sensing of magnetic field using fiber-optic Young’s interferometric configuration.

© 2014 Japan Society of Applied Physics, Optical Society of America