基于偏磁薄膜矫正的石榴石型光电式磁场/电流传感器研究

项目名称： 基于偏磁薄膜矫正的石榴石型光电式磁场/电流传感器研究

项目编号： No.61205076

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 焦新兵

作者单位： 上海理工大学

项目金额： 28万元

中文摘要： 光电式电流互感器因其克服了传统电磁式电流互感器的缺点，是智能电网电流监测的理想选择。但目前无源型、有源型、全光纤型光电式电流互感器因其缺陷，限制了其广泛应用。石榴石型光电式电流互感器，因其核心元件石榴石磁畴易受热扰动的影响，导致器件测量误差，这在很大程度上阻碍了人们对其机理的深入研究。本项目旨在设计和研制石榴石型光电式磁场/电流传感器,建立偏磁薄膜影响传感器性能的理论模型，利用磁控溅射法在石榴石上生长钕铁硼偏磁薄膜，改变石榴石的磁畴分布，并实现提高器件测量灵敏度和扩大测量范围的目的。具体包括：1）器件结构设计与理论计算，优化工艺参数提高偏磁薄膜的性能；2）建立偏磁薄膜影响石榴石磁畴分布的理论模型；3）通过调试石榴石型光电式磁场/电流传感器测试系统，研究器件性能，为进一步研究石榴石型光电式电流互感器打下基础。

中文关键词： 石榴石；偏磁薄膜；传感器；偏振性能；偏振调节器

英文摘要： The optical current transducer is the ideal choice of current monitoring in the smart grid, as it overcomes the shortcomings of the traditional electromagnetic current transducer. However，the passive, active, all-fiber optical current transducer, because of their defects, limitted their wider application. Garnet-type optical current transducer, as the impact of the thermal disturbance in garnet magnetic domain, easily lead to device measurement error.This hinders the depth understanding of its mechanism. This project aims to design and develop a garnet-type optical magnetic field/current sensor, establish the theoretical model of the biasing magnetic film affect the sensor.The NdFeB biasing magnetic film will be deposited onto garnet substrate by magnetron sputtering method.The magnetic domain distribution in garnet will be controlled, the device measurement sensitivity will be improved, and the measurement range will be expanded.These include: 1)design structure of the sensor, optimize the process parameters to improve the performance of biasing magnetic film; 2)A theoretical model of magnetic domain distribution in the garnet impacted by biasing magnetic film will be established; 3) The garnet-type photoelectric magnetic field/current sensor test system will be adjusted, and the device performance can be test

英文关键词： garnet；biasing film；sensor；polarization property；polarization modulator