基于速率方程的Er^(3+):PLZT陶瓷荧光特性分析

Analysis of 1550nm fluorescence characteristics of Er^(3+) doped PLZT ceramics based on rate equation

利用简化的速率方程研究不同激发波长条件下Er^(3+):PLZT陶瓷的1 550 nm荧光特性。分析荧光强度随激发光强度和Er^(3+)掺杂浓度的变化情况以及ETU和ESA对1 550 nm荧光发射的影响。结果表明,掺Er^(3+)浓度增加需伴随较大的激发光强度才能得到较强的荧光强度,且上转换对1 550 nm荧光有一定抑制作用。

The 1550 nm fluorescence characteristics of Er^3＋-doped lead lanthanum zirconate titanate（ PLZT） ceramics excited at different wavelengths were investigated by simplified rate equation theory. The influence of fluorescence excitation intensity and Er^3＋-doped concentration on the photoluminescence characteristics and the effects of energy transfer upconversion（ ETU） and excited state absorption（ ESA） on the photoluminescence were analysed. The results show that the 1550 nm fluorescence intensity increases with Er^3＋-doped concentration and excitation intensity and the upconversion has a certain inhibitory effect on the fluorescence of 1550 nm.