文献类型：期刊文献

英文题名：Spectroscopic properties of Ho³⁺/Yb³⁺ codoped lanthanum aluminum germanate glasses with efficient energy transfer

作者：Zhang, Qiang[1,2];Chen, Guorong[3];Zhang, Guang[1,2];Qiu, Jianrong[4];Chen, Danping[1]

机构：[1]Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Key Lab Mat Sci & Technol High Power Lasers, Shanghai 201800, Peoples R China;[2]Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China;[3]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[4]Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

年份：2009

卷号：106

期号：11

外文期刊名：JOURNAL OF APPLIED PHYSICS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000272838600002)】；

基金：The authors would like to acknowledge financial support from the National Natural Science Foundation of China (Grant Nos. 60878043 and 60707019 ).

语种：英文

外文关键词：aluminium compounds; germanate glasses; holmium; Judd-Ofelt theory; lanthanum compounds; optical glass; photoexcitation; quenching (thermal); solid lasers; ytterbium

摘要：Ho3+/Yb3+ codoped lanthanum aluminum germanate glasses are prepared simply by melt-quenching method. The 2 mu m emission characteristic and energy transfer from Yb3+ to Ho3+ upon excitation of a conventional 980 nm laser diode is investigated and the energy transfer efficiency is as high as 83%. The spectroscopic parameters are calculated based on Judd-Ofelt (J-O) theory, the intensity parameters (2), (4), and (6) are 4.44, 1.92, and 1.11x10(-20) cm(2), respectively. The transition probabilities and branching ratios are also estimated by using the J-O parameters. Beer-Lambert and Fuchtbauer-Ladenburg theories are applied to calculate the absorption, emission, and gain cross sections of I-5(7)-> I-5(8) transition.