掺Tm^(3+)氟锆酸盐玻璃2μm发光特性  

2μm Emission Properties of Tm^(3+)-Doped Fluorozirconate Glass

作　　者：张军杰[1] 于春雷[1] 赖杨琼[1] 张丽艳[1] 胡丽丽[1] 

机构地区：[1]中国科学院上海光学精密机械研究所中国科学院强激光材料重点实验室,上海201800

出　　处：《光学学报》2010年第5期1422-1426,共5页Acta Optica Sinica

基　　金：国家863计划(2007AA03Z441)资助课题

摘　　要：研究了Tm3+掺杂氟锆酸盐玻璃的2μm发光特性。通过吸收光谱,运用Judd-Ofelt(J-O)理论计算了J-O强度参量tΩ(t=2,4,6)以及Tm3+离子在玻璃中的自发辐射跃迁几率、荧光分支比和辐射跃迁寿命等光谱参数。采用808 nm激光二极管(LD)抽运,获得了Tm3+离子在氟锆酸盐玻璃中的近2μm发射光谱。Tm3+离子在玻璃中的3F4→3H6跃迁峰值波长位于1.82μm处。研究表明,随着Tm3+离子浓度的增加,Tm3+离子之间发生明显的交叉弛豫过程(3H4→3F4,3F4→3H6),从而使得1.82μm处荧光强度明显增强,但当掺杂浓度进一步增加达到一定程度后,基于三能级稀土离子的浓度猝灭效应,该荧光强度明显降低。研究计算了氟锆酸盐玻璃中Tm3+…3F4→3H6跃迁对应的受激发射截面,结果表明,受激发射截面受Tm3+掺杂浓度的影响不大。2μm emission properties of Tm3＋ in fluorozirconate glass were reported.The Judd-Ofelt（J-O） intensity parameters Ωt（t=2,4,6）,spontaneous emission probability,fluorescence branching ratio,and the radiative lifetime were calculated on the basis of Judd-Ofelt theory by measuring the absorption spectra of the glass.The effects of Tm3＋ ion concentration on the optical parameters were discussed.From the measured emission spectra of glass,it was found that the peak wavelength of Tm3＋：3F4→3H6 transition is located at 1.82 μm in the Tm3＋-doped fluorozirconate glass.It was also found that the cross relaxation（3H4→3F4,3F4→3H6） between the Tm3＋ ions occurred with the Tm3＋ ion concentration increasing,which leads to the increasing magnitude of 3F4→3H6 transition.Due to the concentration quenching mechanism of three-energy level ions,the intensity of luminescence decreased obviously.The stimulated emission cross section of Tm3＋：3F4→3H6 transition was calculated by using Mcumber theory.The results show that doping concentration has little effect on the emission cross section of Tm3＋ in the present fluorozirconate glass.

关 键 词：氟锆酸盐玻璃 Tm3+离子 JUDD-OFELT理论 2μm发光特性 

分 类 号：O432.12[机械工程—光学工程]