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TbYbBiIG晶体在1500~1620nm波段的带宽和温度特性研究

Keywords: 磁光材料铁石榴石法拉第转子

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Abstract:

以Bi2O3/B2O3为主助熔剂和加速坩埚旋转技术改进的高温助熔剂法生长出掺Bi复合稀土铁石榴石TbxYbyBi3-x-yFe5O12单晶.研究了该系列晶体材料在近红外通信波段(波长λ=1500~1620nm)处的磁光性能,其中Tb0.91Yb1.38Bi0.71Fe5O12单晶有大的比法拉第旋转角-1671.2°/cm(λ=1550nm,25℃),小的饱和磁化强度(4πMs=0.6×106A/m),小的法拉第旋转温度系数(FTC=3.92×10-5/K,λ=1550nm),在λ=1500~1620nm波长范围的法拉第旋转波长系数FWC(25℃)为0.009%/nm,在λ=1500~1620nm波长和25~95℃温度范围内反向隔离度>40dB.综合性能表明TbxYbyBi3-x-yFe5O12适合用作光通讯系统中宽带和温度稳定的高性能光隔离器的法拉第转子材料.

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