中文摘要：

报道了Tm^3＋／HO^3＋共掺的镓铋酸盐玻璃14Ga2O3—25Bi2O3—20GeO2—31PbO-10PbF2玻璃1．47μm（S波段）发光和能量传递特征，应用Judd—Ofelt理论计算了玻璃的强度参数Ωt（t=2，4，6），自发辐射概率A、荧光分支比β，荧光辐射寿命τ等各项光谱参数以及有效荧光线宽△λeff和峰值发射截面σe^peak．通过测量荧光光谱和荧光寿命研究了Ho^3＋离子掺杂浓度对Tm^3＋离子1．47μm波段发光性能的影响，分析了Tm^3＋和Ho^3＋之间的能量传递过程．结果表明一定浓度内Ho^3＋的共掺迅速降低了Tm^3＋：^3F4能级的粒子数，而对^3H4能级粒子数影响不大，从而降低了^3F4和^3H4能级间布居数反转的难度，极大地提高了1．47μm发光效率．研究表明镓铋酸盐玻璃是适用于S波段光纤放大器的一种潜在基质材料，而掺杂一定浓度的Ho^3＋离子有利于提高Tm^3＋离子在1．47μm波段的发光效率．

英文摘要：

This paper reports on the spectroscopic properties and energy transfer of Tm^3＋/Ho^3＋ -codoped 14Ga2O3-25Bi2O3-20GeO2- 31PbO-10PbF2 glasses. The Judd-Ofeh intensity parameters Ωt （ t = 2,4,6）, spontaneous-emission probability, branch ratio and radiative lifetime of each level of Tm^3 ＋ have been calculated by Judd-Ofeh theory. The effective bandwidth and peak emission cross-section of the ^3H4→^3F4 transition （ 1.47 μm） of Tm^3 ＋ have also been obtained. Codoping of Ho^3 ＋ significantly decreased the population of ^3F4 level of Tm^3 ＋ , while the population of ^3 H4 level of Tm^3 ＋ reduced slightly. Our results indicate that GGBPF glass is a promising candidate for 1.47 μm optical amplifiers, and Ho^3 ＋ is an effective codopant to enhance the 1.47 μm luminescence.