Tm:Yb:KY(WO_4)_2晶体蓝光上转换  

Blue Up-Conversion in Yb^(3+) and Tm^(3+)-Codoped KY(WO_4)_2

作　　者：毛露路[1] 林海[1] 张莹[1] 王成伟[2] 刘文莉[2] 朱忠丽[1] 刘景和[1] 

机构地区：[1]长春理工大学光电功能材料教育部工程研究中心,吉林长春130022 [2]中国兵器科学研究院,北京100089

出　　处：《中国激光》2007年第5期711-714,共4页Chinese Journal of Lasers

基　　金：吉林省科技发展计划项目(2005506)资助课题

摘　　要：利用顶部籽晶提拉(TSSG)法生长了Yb3+,Tm3+共掺KY(WO4)2晶体,在室温下测量了290～1200nm内晶体的吸收光谱。根据上转换模型研究了晶体中Yb3+向Tm3+进行能量传递的机制并对晶体中跃迁能级进行了指认,建立了简单的速率方程。计算得出Yb3+离子向Tm3+离子的能量传递效率接近于1。在974nm激光二极管抽运下观察到Tm3+离子的波长为476nm蓝色上转换发光。利用Fadenbrug-luechtbauer方法计算了1G4到3H6能级跃迁的发射截面积,其最大发射截面积约为1.51×10-20cm2。Thulium and ytterbium codoped KY（WO4 ）2 crystals were prepared by using top seeded solution growth （TSSG） method. Its absorption spectra were recorded in the region of 290- 1200 nm at room temperature. The energy transfer mechanism from Yb^3＋ to Tm^3＋ ions was analyzed by using up-conversion model and the transitions of energy levels were assigned. The rate equation of Yb^3＋ ions to Tm^3＋ ions energy transition was set up. The efficiency of Yb^3＋ ions to Tm^3＋ ions energy transition is close to 1. The up-conversion blue fluorescences at 476 nm were measured when the sample was pumped by 974 nm diode laser. The value of emission cross section for ^1 G4 to 3 H6 transition is estimated with Fadenbrug-luechtbauer method and the peak value is about 1.51×10^-20cm^2.

关 键 词：材料 蓝光上转换 钨酸钇钾 能量传递 

分 类 号：TN244[电子电信—物理电子学]