以K2O为助熔剂,采用大的固液界面温度梯度(90～100℃),应用坩埚下降法成功地生长了含Eu(3+)离子(原料中初始Eu(3+)摩尔浓度0.95%)的近化学计量比铌酸锂单晶.测定了晶体中Eu(3+)离子的浓度以及晶体的室温吸收光谱、激发与发射光谱.根据晶体吸收边的位置,估算出晶体中Li2O的摩尔分数含量为约49.47%.分别在光谱与激发光谱中观测到特征的Eu(3+)吸收与激发峰.在394nm波长光的激发下观测到5D0-7F(J](0,1,2,3,4)的荧光发射峰.根据测得的不同部位Eu(3+)离子的浓度与不同部位晶片的吸收和发射峰的强度情况,可推断出Eu(3+)离子浓度在晶体中的分布沿着生长方向逐渐减少.根据测得的Eu(3+)浓度,计算得到有效分凝系数为约1.02.
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