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YbBi:YIG磁光电流传感器性能研究

Keywords: 磁光晶体法拉弟旋转光纤传感器电流传感器

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Abstract:

采用高温助熔剂熔盐生长出了复合掺杂YbBi∶YIG磁光石榴石单晶,并应用于磁光光纤电流传感器研制.此单晶的比法拉弟旋转为-404deg/cm,磁光优值为25.8deg/dB,饱和磁化场为1400Oe,温度系数为4.2×10-4K-1(室温,λ=1.55μm).与纯YIG相比具有较好的磁光性能,有更高的比法拉弟旋转角和磁光优值以及较小的温度依赖性.用此单晶作为法拉弟转子材料,建立了单光路结构的磁光光纤电流传感器的实验原型,测试了它在测量50Hz交变电流时的性能,测试结果表明传感系统具有较高的精度和灵敏度并有较好的线性关系.

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