期刊
OPTICAL MATERIALS
卷 42, 期 -, 页码 220-224出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2015.01.012
关键词
Mid-infrared laser; CaYAlO4 crystal; Ion concentration
资金
- National Natural Science Foundation of China [51472240, 91122033, 11304313]
- Knowledge Innovation Program of Chinese Academy of Sciences [KJCX2-EW-H03]
- Key Laboratory of Functional Crystal Materials and Device (Shandong University, Ministry of Education) [JG1403]
- Natural Science Foundation of Fujian University of Techonology [4Y-Z15001]
Three heavily Er3+-doped caYAlO(4) single crystals were successfully grown by Czochralski method. The emission spectra and the fluorescence decay curves have been recorded at room temperature. A combination of experimental data, rate equation and Dexter theory are used to investigate the influence of Er3+ doping concentration on the spectra character and the inner cross relaxation of Er3+:CaYAlO4 crystal. Results show that the self terminate effect of the transition I-4(11/2) -> I-4(13/2) can be suppressed by heavy Er(3+)doping. But if the doping concentration goes too high, the much larger cross relaxation coefficient of I-4(11/2) level than that of I-4(13/2) level would results in the increase of up-conversion emission and the quench of near and mid infrared emission. The laser performance was also studied. The maximum output power of 225 mW at 2733 nm was acquired with an optical conversion efficiency of 14.9%. (C) 2015 Elsevier B.V. All rights reserved.
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