Fiber-optic magnetic field sensors are attracting interest for applications in navigation, magnetic resonance, geophysics, space systems, power transformers, and generators, especially for harsh environments, at long distances, and for multiple monitoring points. This article presents a computational modeling for optical fiber-based magnetic field sensors using the magnetooptical Faraday and Kerr effects on the polar configuration. We propose two sensor profiles: one using a thin film of Fe and the other using a Ce:YIG layer. A simplified analytical model based on Fresnel equations is used to guide the numerical modeling built on COMSOL Multiphysics. The sensors’ design methodology is also presented, which optimizes the sensor operating range and sensitivity. The proposed sensor sensitivity, resolution, and operating range are presented and compared to others found in the literature. The results indicate the possibility of building high-resolution sensors for a restricted range of magnetic field intensities or a wide-operating range sensor.

中文翻译：

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使用法拉第和克尔磁光效应对基于光纤的磁场传感器进行计算建模

光纤磁场传感器在导航、磁共振、地球物理学、空间系统、电力变压器和发电机中的应用引起了人们的兴趣，特别是在恶劣环境、长距离和多个监测点的应用中。本文介绍了使用磁光法拉第和克尔效应对极性配置的基于光纤的磁场传感器的计算建模。我们提出了两种传感器配置文件：一种使用 Fe 薄膜，另一种使用 Ce:YIG 层。基于菲涅耳方程的简化分析模型用于指导基于 COMSOL Multiphysics 的数值建模。还介绍了传感器的设计方法，它优化了传感器的工作范围和灵敏度。建议的传感器灵敏度、分辨率、和工作范围被提出并与文献中的其他人进行比较。结果表明，可以为有限范围的磁场强度或宽工作范围传感器构建高分辨率传感器。