Tm^(3+)Yb^(3+)共掺铋碲酸盐玻璃中的高效蓝色上转换荧光  

Intense blue upconversion fluorescence of Tm ^(3+) /Yb ^(3+) -codopedbismuth tellurite glasses

作　　者：杨殿来[1] 侯嫣嫣[1] 赵昕[1] 刘贵山[1] 林海[1] 刘克[2] Edwin Yue-Bun Pun 

机构地区：[1]大连轻工业学院化工与材料学院,大连116034 [2]香港城市大学电子工程系

出　　处：《物理学报》2006年第8期4304-4309,共6页Acta Physica Sinica

基　　金：辽宁省自然科学基金(批准号:20041067);大连市科学技术基金(批准号:2004166);教育部留学回国人员科研启动基金(批准号:2005383)资助的课题~~

摘　　要：制备了高折射率Tm3+Yb3+共掺杂铋碲酸盐玻璃,利用棱镜耦合法测量出玻璃在632.8和1550nm波长处的折射率分别为2.0365和1.9795.对玻璃的吸收、荧光和红外透过光谱展开了测试与分析,根据JuddOfelt理论对吸收光谱进行拟合,求得Tm3+的振子强度参数Ωt(t=2,4,6)分别为3.90×10-20,2.03×10-20和9.03×10-21cm2,并进一步计算了Tm3+在玻璃中各能级跃迁的振子强度、自发辐射跃迁概率、辐射寿命和荧光分支比等光谱参数.在980nm激光激发下测得强的蓝色三光子上转换和近红外双光子上转换荧光.宽的红外透过窗口、高的折射率和强的蓝色上转换荧光表明,Tm3+Yb3+共掺铋碲酸盐玻璃有希望成为高效的上转换发光和激光材料.In this paper,Tm^3＋/Yb^3＋ -codoped bismuth tellurite glasses with high refractive index have been synthesized. The refractive index of Tm^3＋/Yb^3＋-codoped bismuth tellurite glasses were measured by Metricon 2010 prism coupler at two wavelengths, and the values nl = 2.0365 at 632.8 nm and n2 = 1.9795 at 1550 nm were obtained. The absorption spectra, fluorescence spectra and infrared transmittance spectra of this glass were measured and analyzed. Based on Judd-Ofelt theory, and intensity parameters Ωt （t = 2,4 and 6） were obtained to be 3.90 ~ 10^-20, 2.03 × 10^-20 and 9.03 × 10^-21 cm^2, respectively. Then the radiative transition probabilities, radiative lifetimes and fluorescence branching ratio were calculated. Intense blue three-photon upconversion fluorescence and near-infrared two-photon upconversion fluorescence were investigated under the excitation of 980 nm diode laser at room temperature. Wide infrared transmission window, high refractive index and strong blue three-photon upconversion emission of Tm^3＋ indicate that Tm^3＋/Yb^3＋ -codoped LKBBT glasses are promising upconversion optical and laser materials.

关 键 词：Tm^3+/Yb^3+共掺 铋碲酸盐玻璃 光谱参数 上转换荧光 

分 类 号：TN244[电子电信—物理电子学]