掺Er3+卤碲酸盐玻璃上转换能级寿命和发光性能研究

对不同激发条件下Er3+离子在卤碲酸盐玻璃中的上转换能级寿命进行了测试.上转换激发时，由于Er3+离子间以及Er3+不同能级间能量转移的影响，使得其寿命远大于直接激发条件下的值.比较了碲酸盐玻璃和卤碲酸盐玻璃中Er3+离子的上转换发光 强度，卤化物离子引入后引起发光强度的明显增加.探讨了Er3+离子在卤碲酸盐玻璃 中的发光机制及上转换发光强度对抽运功率的依赖性. 关键词： 卤氧玻璃 上转换发光 激发条件

Determination of upconversion state lifetime and upconversion mechanisms of Er3+ in tellurite glasses

We compared the lifetime values of the upconversion state for Er3+doped tellurite glass with and without halide ions as determined by direct excitation mechanism, with the results measured by upconversion excitation method. The results indicate that upconversion excitation lengthens the lifetime value largely compared with the direct excitation. The intensity of the upconversion fluorescen ce of the two kinds of glasses was discussed, which showed that it becomes stron ger with the addition of the halide ions than that without the halide ions. The upconversion mechanisms and power-dependent intensities were also determined and explained.