Luminescent properties of Tm^(3+)/ Ho^(3+) co-doped LiYF_4 crystals  

作　　者：李珊珊 夏海平 董艳明 符立 谷雪梅 章践立 王冬杰 江浩川 陈宝玖 

机构地区：[1]Key Laboratory of Photoelectronic Materials, Ningbo University [2]Department of Physics, Dalian Maritime University [3]Ningbo Institute of Materials Technology and Engineering, the Chinese Academy of Sciences

出　　处：《Optoelectronics Letters》2014年第6期443-446,共4页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51472125 and 51272109);the Natural Science Foundation of Ningbo City(No.201401A6105016);K.C.Wong Magna Fund in Ningbo University

摘　　要：Ho3+ with various concentrations and Tm3+ with molar concentration of 1.28% are co-doped in Li YF4(YLF) single crystals. The luminescent properties of the crystals are investigated through emission spectra, emission cross section and decay curves under the excitation of 808 nm. The energy transfer from Tm3+ to Ho3+ and the optimum fluorescence emission of Ho3+ around 2.05 μm are investigated. The emission intensity at 2.05 μm keeps increasing with the molar concentration of Ho3+ improved from 0.50% to 1.51% when the molar concentration of Tm3+ is kept at 1.28%. Moreover, for the co-doped crystals in which the molar concentrations of Tm3+ and Ho3+ are 1.28% and 1.51%, respectively, the maximum emission cross section reaches 0.760×10–20 cm2 and the maximum fluorescence lifetime is 21.98 ms. All the parameters suggest that these materials have more advantages in the future 2.0 μm laser applications.

关 键 词：molar lifetime luminescent excitation reaches doping decay coherent excited tensity 

分 类 号：TN248.1[电子电信—物理电子学]