Deactivation effects of the lowest excited state of Ho3+ at 2.9 μm emission introduced by Pr3+ ions in LiLuF4 crystal.
Deactivation effects of the lowest excited state of Ho3+ at 2.9 μm emission introduced by Pr3+ ions in LiLuF4 crystal.
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DOI：
10.1364/ol.37.005241
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发表时间：
2012-12
期刊：
影响因子：
3.6
通讯作者：
Peixiong Zhang;Y. Hang;Lianhang Zhang
中科院分区：
文献类型：
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作者：
Peixiong Zhang;Y. Hang;Lianhang Zhang
首次在LiLuF4晶体中研究了Pr3+共掺杂增强Ho3+:5I6→5I7中红外发射。结果表明，Pr3+通过减少Ho3+:5I7能级而使Ho3+:5I6能级显著增加Ho3+ 2.9 μm发射度，而对Ho3+:5I6能级影响不大，导致了较大的能级反转。从Ho3+:5I7到Pr3+:3F2的能量传递效率为88%。基于Judd-Ofelt理论，计算出2.9 μm发射截面为1.91×10(-20) cm2，并讨论了Ho3+:5I6→5I7跃迁的增益特性。我们认为Ho， Pr:LiLuF4晶体可能是一种很有前途的2.9 μm激光材料。
The use of Pr3+ codoping for enhancement of the Ho3+:5I6 →5I7 mid-IR emissions were investigated in the LiLuF4 crystal for the first time. It was found that Pr3+ greatly increased Ho3+ 2.9 μm emission by depopulating the Ho3+:5I7 level while having little influence on the Ho3+:5I6 level, leading to greater population inversion. The energy transfer efficiency from Ho3+:5I7 to Pr3+:3F2 is calculated to be 88%. Based on Judd-Ofelt theory, the 2.9 μm emission cross section is calculated to be 1.91×10(-20) cm2, and the gain property of the Ho3+:5I6 →5I7 transition is discussed. We propose that the Ho, Pr:LiLuF4 crystal may be a promising material for 2.9 μm laser applications.