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碘化铅对Dy3+掺杂GeS2-Ga2S3玻璃荧光光谱性质的影响

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Abstract:

采用熔融淬冷法制备了掺杂浓度为0.3%(质量分数)的Dy3+(100-x)(0.8GeS2-0.2Ga2S3)-xPbI2(x=5,10,15,摩尔比)系列硫卤玻璃样品,测试了样品热稳定性、折射率、密度、吸收光谱、近红外及中红外荧光光谱。应用Judd-Ofelt理论计算了Dy3+在系列样品中的强度参数((t,t=2,4,6)、自发辐射跃迁几率、荧光分支比以及辐射寿命等光谱参数。讨论了PbI2含量对样品的吸收光谱、光谱参数以及荧光光谱的影响。在Dy3+掺杂样品中,PbI2含量的增加有效地提高了1330nm和2860nm处的荧光强度。计算了0.3%Dy3+掺杂68GeS2-17Ga2S3-15PbI2玻璃在1330nm和2860nm处的受激发射截面值分别为3.63×10-20cm2和1.57×10-20cm2,2860nm处的量子效率为83.8%。

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