【摘要】 以B i2O3/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B i复合稀土铁石榴石TbxYbyB i3-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Tb0.91Yb1.38B i0.71Fe5O12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(4πM s=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TbxYbyB i3-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.更多还原

【Abstract】 By using the improved high temperature flux method with Bi₂O₃/B₂O₃ as main flux and the accelerated crucible rotation technique,Bi-doped compound rare earth iron garnet bulk single crystals Tb_xYb_yBi_3-x-yFe₅O₁₂ were grown.The magneto-optical properties of these crystals were investigated in the near-infrared communication band（λ=1500¹620nm）.Tb_0.91Yb_1.38Bi_0.71Fe₅O₁₂ exhibits a large Faraday rotation-1671.2°/cm（λ=1550nm,25℃）,a small saturation magnetization（4πMs=0.6×10⁶A/m）,a small Faraday rotation temperature coefficient(FTC=3.92×10^-5/K,λ=1550nm) and Faraday rotation wavelength coefficient FWC=0.009%/nm in 1500¹620nm at 25℃,the backward isolation above 40dB at 25⁹5℃ and in 1500¹620nm.The above characteristics indicate that Tb_xYb_yBi_3-x-yFe₅O₁₂ is a suitable Faraday rotator material used as wideband and temperature-stabilized optical isolator in the optical communication systems.更多还原