锗酸盐玻璃中Yb^3＋／Tm^3＋／Ho^3＋掺杂浓度对2μm发光的影响  

The Effects of Yb^(3+)/Tm^(3+)/Ho^(3+) Doping Concentration on 2μm Wavelength Luminscence in Germanium Glasses

作　　者：于春雷[1] 何冬兵[1] 汪国年[1] 胡丽丽[1] 张军杰[1] 

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

出　　处：《光学学报》2009年第11期3143-3147,共5页Acta Optica Sinica

基　　金：国家863计划(2007AA03Z441)资助课题

摘　　要：为了研究锗酸盐玻璃中采用Yb3+/Tm3+/Ho3+三掺杂方式实现2μm激光的可行性,研究了3种稀土离子的掺杂浓度对近2μm发光的影响,从而对稀土离子掺杂浓度进行优化选择以确定理想的掺杂浓度。实验结果表明,在TmF3掺杂摩尔分数为1%时,随着Yb3+浓度的提高Ho3+的2μm荧光强度增强;当TmF3掺杂摩尔分数为3%时,随着Yb3+浓度的提高Ho3+的2μm荧光强度降低;随着Yb3+浓度的提高,Tm3+的近2μm荧光发射会得到增强,且当Tm3+浓度较高时其发光更为明显,这相对削弱了Ho3+的2μm荧光。Ho3+2μm发光受Tm3+/Ho3+的浓度比值影响很大,即用980 nm光抽运三掺杂样品,无论Tm3+浓度单一提高还是Ho3+浓度单一降低,对于Ho3+的2μm荧光都是不利的。In order to study on the feasibility of achieving 2μm laser by using Yb^3＋/Tm^3＋/Ho^3＋ codoping in germanium glass, the effects of doping concentration of three rare-earth ion on the nearly 2 μm luminscence were researched, so optimized doping concentration can be acquired. The results show that when the doping mole fraction of TmF3 is 1%, the 2 μm luminscence of Ho3＋ increases with doping concentration of Yb3 ＋ ions. However, as the doping mole fraction of TmF3 is increased to 3 %, the 2μm luminscence intensity of Ho3＋ is reduced with increasing doping concentration of Yb3 ＋ The near 2μm luminscence of Tm3＋ can be raised by increasing doping concentration of Yb3＋ ions and it is more apparent at high doping concentration of Tm3＋ ions, which could weaken the luminscence of Ho3＋ relatively. On the whole, the 2μm luminscence of Ho3＋ is significantly effected by the doping concentration ratio of Tm3＋/Ho3＋ . When the three doped samples were pumped by 980 nm LD, both the high doping concentration of Tm3＋ ions and low doping concentration of Ho^3＋ ions can lead to the reduction of 2μm luminscence intensity of Ho3＋ .

关 键 词：光学材料 锗酸盐玻璃 光谱性质 2ΜM激光 稀土掺杂 

分 类 号：TQ171.735[化学工程—玻璃工业]