High-Sensitivity Magnetic Field Detection Using Whispering Gallery Modes in a Bent Optical Fiber Loop
Year: 2025
Type: article
Abstract: In this study, we present a simple, robust, and highly sensitive magnetic field sensor based on the resonant excitation of whispering gallery modes (WGMs) in a coated single-mode fiber (SMF) loop. This loop is formed by bending a standard coated SMF around magnetostrictive nickel pillars. The deformation induced in the nickel pillar, with a radius of 10 mm, under a magnetic field causes a corresponding shift in the WGMs' resonant wavelength. This setup achieves a high sensitivity of 249.43 pm/mT within the magnetic field range of 0-15 mT.
Authors: Geng Guo, Mengmeng Chen, Xiaoling Jin, Enming Xu, Chen Jiang, Kaiming Zhou, Wei Chen, Bing Sun, Zuxing Zhang
Language: English
Topic: Advanced Fiber Optic Sensors
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Awards: G2829468381, G3560452427
OpenAlex ID: W4412795609