Magneto-optic fiber Bragg gratings with application to high-resolution magnetic field sensors

Abstract

As a new class of fiber Bragg gratings, magneto-optic fiber Bragg gratings (MFBG) based on magneto-optic materials have a lot of potential applications for sensing and optical signal processing. The transmission and reflection spectra of guided optical waves in the MFBG are investigated. According to the sensitivity of MFBG spectral lines to the magneto-optic coupling intensity varying with applied magnetic field, a novel magnetic field sensor of high-resolution up to 0.01 nm/ (kA/m) is predicted.