Study on Stimulated Emission of Eu2+ in Crystal KMgF3∶Eu2+
MO Feng-shan1, 3,SU Hai-quan2, 3,ZHU Guo-xian1, 3,SHI Chun-shan3*
1. School of Life Science and Chemistry, Zhanjiang Normal College, Zhanjiang 524048, China 2. Department of Chemistry and Chemical Engineering, Inner Mongolia University, Huhhot 010021, China 3. Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
Abstract：The line emission peak of Eu2+ ion in crystal KMgF3 is at 360 nm. The probability of stimulated emission on 4f7(6P7/2)→4f7(8S7/2) transition was predicted with a four-level decay model of Eu2+6P7/2 excited states proposed by the authors. Optic gain and net gain coefficient (g=11.4±3.2)cm-1 of 360 nm emission in crystal KMgF3∶Eu2+ were measured by ASE method, and the predication was proved by experiment. The net gain coefficient can be increased by annealing or doping crystal KMgF3∶Eu2+ with Gd3+ or Ce3+.
Key words：KMgF3∶Eu2+ crystal;f→f transition;Stimulated emission;Energy transfer;Optic gain
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