Distributed parametric modeling and simulation of light polarization states using magneto-optical sensing based on the Faraday effect

• Published in: Science China. Technological sciences Vol. 59; no. 12; pp. 1899 - 1910
• Main Authors: Li, YanSong, Liu, Jun, Cao, LiXin, Liu, QiZhi
• Format: Journal Article
• Language: English
• Published: Beijing Science China Press 01.12.2016; Springer Nature B.V
• Subjects: Accumulation; Birefringence; Dielectric properties; Engineering; Faraday effect; Finite element method; Magnetic fields; Magnetic properties; Mathematical models; Optical materials; Optical measuring instruments; Optical properties; Optics; Parameters; Parametric statistics; Polarization; Simulation; 仿真; 偏振态; 参数建模; 基础; 有限元分析方法; 法拉第效应; 磁光传感器; 磁光效应; infinitesimal distributed-parameter model; linear birefringence; multi-physics coupling; COMSOL; Faraday effect; magneto-optical sensor
• ISSN: 1674-7321; 1869-1900
• DOI: 10.1007/s11431-015-0380-4

To solve the problems encountered in practical processes of magneto-optical sensing, the infinitesimal distributed-parameter model and finite-element accumulation of different dielectric properties of micromaterials were used to describe the evolution of light polarization states, instead of the previously commonly used method of lumped-parameter simulation, thus essentially explaining the mechanism of sensing, magneto-optical effects, and related factors, and achieving multiphysics coupling using the COMSOL finite-element analysis method. Considering the cases of the Faraday effect without and with line birefringence, the magneto-optical effect and output characteristics of an infinitesimal magneto-optical sensor were simulated and studied. The results verified the effectiveness of the infinitesimal sensor model. Because the magnetic field, stress, and temperature changes alter the dielectric properties of magneto-optical materials, the finite-element accumulation method lays a good foundation for research on theoretical analysis and performance of magneto-optical sensors affected by factors such as the magnetic field, temperature, and stress.