Enhanced ~2.7µm emission investigation of Er3+:4I11/2→4I13/2 transition in Yb,Er,Pr:SrLaGa3O7 crystal
Enhanced ~2.7µm emission investigation of Er3+:4I11/2→4I13/2 transition in Yb,Er,Pr:SrLaGa3O7 crystal
复制标题
Yb,Er,Pr:SrLaGa3O7 晶体中 Er3 :4I11/2→4I13/2 跃迁的增强 ~2.7 µm 发射研究
DOI：
10.1016/j.jlumin.2016.11.039
复制
发表时间：
2017
影响因子：
3.6
通讯作者：
Chaoyang Tu
中科院分区：
文献类型：
--
作者：
Yan Wang;Baotong Zhang;Jianfu Li;Zhaojie Zhu;Zhenyu You;Chaoyang Tu
采用5at%Yb ~（3+）、20at%Er ~（3+）和0.2at%Pr ~（3+）三重掺杂的SrLaGa_3 O_7（简称SrLaGa_3 O_7）晶体，研究了其晶体结构和晶体生长特性。作为Yb，Er，Pr：SLGO）。通过测量其吸收光谱、近红外和中红外荧光光谱以及室温下Er 3+：4 I13/2和4 I11/2能级的荧光衰减曲线，研究了Yb 3+和Pr 3+共掺杂对Er 3+：4 I13/2和Er 3+：4 I11/2的光谱性质的影响及其相互能量传递机制。Yb，Er，Pr：SLGO晶体中Er 3+：4 I11/2→ 4 I13/2跃迁对应的~2.7 μm发射强度比20at%Er 3+单掺SrLaGa 3 O 7晶体有明显增强。光谱分析表明，Yb 3+对Er 3+的敏化提高了Yb，Er，Pr：SLGO晶体的~2.7 μm发射，而Pr 3+从Er 3+中的退布居降低了~1.5 μm发射，抑制了自终止效应。计算并讨论了Yb ~（3+）→ Er ~（3+）（ET 1）、Er ~（3+）→ Pr ~（3+）（ET 2）和Er ~（3+）→ Pr ~（3+）（ET 3）的能量转移效率。上述结果表明Yb，Er，Pr：SLGO晶体是一种很好的LD泵浦中红外激光器候选晶体。
The bulk crystal of 5at% Yb3+, 20 at% Er3+and 0.2 at% Pr3+triply doped SrLaGa3O7(abbr. as Yb,Er,Pr:SLGO) was grown by the Czochralski method. The effects of co-dopant Yb3+and Pr3+on the spectroscopic properties and the mutual energy transfer mechanism were investigated, via the measurements of its absorption, near-infrared and mid-infrared fluorescence spectra, as well as the fluorescence decay curves of Er3+:4I13/2and4I11/2levels at room temperature. As compared with 20at% Er3+singly doped SrLaGa3O7crystal, ~2.7 µm emission intensity corresponding to Er3+:4I11/2→4I13/2transition is enhanced greatly in the Yb,Er,Pr:SLGO crystal. Spectral analyses indicate that the sensitization of Yb3+to Er3+improves the ~2.7 µm emission in Yb,Er,Pr:SLGO crystal, meanwhile, the depopulation of Pr3+from Er3+decreases the ~1.5 µm emission and inhibits the self-termination effect. The energy transfer efficiencies of Yb3+→Er3+(ET1), Er3+→Pr3+(ET2) and Er3+→Pr3+(ET3) were estimated and discussed. The above results conclude that Yb,Er,Pr:SLGO crystal is a good candidate for LD pumped mid-infrared laser.