【摘要】 在Er³⁺/Yb³⁺共掺TeO2-WO3-ZnO玻璃中引入Ce³⁺,研究了Ce³⁺对Er³⁺1·5μm发射性能及其上转换发光性能的影响。结果表明,随Ce³⁺浓度的增加Er³⁺1·5μm波段的荧光强度先增强后降低,优化的Ce³⁺掺杂浓度在2·07×10²⁰/cm3左右;1·5μm波段的荧光寿命则随Ce³⁺浓度的增加有轻微降低,从3·4ms降到3·0ms,但Ce³⁺浓度的增加对1·5μm波段的荧光半高宽基本无影响;Er³⁺/Ce³⁺间的交叉弛豫Er³⁺（4I11/2）+Ce³⁺（2F5/2）→Er³⁺（4I13/2）+Ce³⁺（2F7/2）使玻璃的上转换发光强度大大降低,但在过高的Ce³⁺浓度下,Er³⁺/Ce³⁺间的另一交叉弛豫Er³⁺（4I13/2）+Ce³⁺（2F5/2）→Er³⁺（4I15/2）+Ce³⁺（2F7/2）则使Er³⁺4I13/2能级粒子数减少,导致1·5μm波段荧光强度和荧光寿命降低.更多还原

【Abstract】 Ce 3+ ions were introduced into the Er 3+ /Yb 3+ -codoped TeO₂-WO₃-ZnO glasses, and the effect of Ce 3+ on the emission properties at 1.5μm band and the upconversion luminescence of Er 3+ in the glasses was investigated. With the increasing of Ce 3+ concentration, the emission intensity of Er 3+ at 1.5μm band increases firstly, and then decreases. The optimal doping concentration of Ce 3+ is about 2.07×10 20 /cm³. As for the Er 3+ emission at 1.5-μm band, the fluorescence lifetime decreases a little from 3.4ms to 3.0ms, while the full width at half maximum （FWHM） hardly changes with the increase of Ce 3+ concentration. Due to the effective cross relaxation between Ce 3+ and Er 3+ : Er 3+ （⁴I 11/2 ）+Ce 3+ （²F 5/2 ）→Er 3+ （⁴I 13/2 ）+Ce 3+ （²F 7/2 ）, the upconversion emission intensity of Er 3+ is reduced greatly. But when Ce 3+ -doping concentration is too high, the other cross relaxation between Ce 3+ and Er 3+ : Er 3+ （⁴I 13/2 ）+Ce 3+ （²F 5/2 ）→Er 3+ （⁴I 15/2 ）+Ce 3+ （²F 7/2 ） happens, which depopulates the ⁴I 13/2 level of Er 3+ and results in the decrease of the emission intensity and fluorescence lifetime of Er 3+ at 1.5μm band.更多还原