| Jiang-tao Peng,Hai-ping Xia,Pei-yuan Wang,Hao-yang Hu,Lei Tang,Yue-pin Zhang,Hao-chuan Jiang,Bao-jiu Chen.Enhanced emission of 2.9 μm from Ho3+/Pr3+ co-doped LiYF4 crystal excited by 640 nm[J].Optoelectronics Letters,2013,9(5):362-366 |
| Enhanced emission of 2.9 μm from Ho3+/Pr3+ co-doped LiYF4 crystal excited by 640 nm |
| Author Name | Affiliation | E-mail | | Jiang-tao Peng | Key laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | | | Hai-ping Xia | Key laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | hpxcm@nbu.edu.cn | | Pei-yuan Wang | Key laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | | | Hao-yang Hu | Key laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | | | Lei Tang | Key laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | | | Yue-pin Zhang | Key laboratory of Photo-electronic Materials, Ningbo University, Ningbo, 315211, China | | | Hao-chuan Jiang | Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315211, China | | | Bao-jiu Chen | Department of Physics, Dalian Maritime University, Dalian, 116026, China | |
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| Abstract: |
| The use of Pr3+ co-doping for great enhancement of mid-infrared (mid-IR) emissions at 2.9 μm and 2.4 μm is investigated in the Ho3+/Pr3+ co-doped LiYF4 crystals. With the introduction of Pr3+ ions, the fluorescence lifetime of Ho3+:5I7 level is 2.15 ms for Ho3+/Pr3+co-doped crystal, and the lifetime for Ho3+ singly doped crystal is 17.70 ms, while the lifetime of Ho3+:5I6 level decreases slightly from 2.11 ms for Ho3+:LiYF4 to 1.83 ms for Ho3+/Pr3+:LiYF4. It is also demonstrated that the introduction of Pr3+ greatly increases the mid-infrared emission of Ho3+:5I6→5I7 which depopulates the Ho3+:5I7 level, while it has little influence on the Ho3+:5I6 level, which is beneficial for greater population inversion and laser operation. The analysis on the decay curves of the 2.0 μm emissions in the framework of the Inokuti-Hirayama model indicates that the energy transfer from Ho3+ to Pr3+ is mainly from electric dipole-dipole interaction. The calculated efficiency of energy transfer from Ho3+:5I7 to Pr3+:3F2 level is 87.53% for Ho3+/Pr3+ (1.02%/0.22%) co-doped sample. Our results suggest that the Ho3+/Pr3+ co-doped LiYF4 single crystals may have potential applications in mid-IR lasers. |
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