Luminescence and Judd-Ofelt analysis of the Pr3+ doped fluorotellurite glass
Luminescence and Judd-Ofelt analysis of the Pr3+ doped fluorotellurite glass
复制标题
Pr3 掺杂氟碲酸盐玻璃的发光和 Judd-Ofelt 分析
DOI：
10.1016/j.jlumin.2014.11.047
复制
发表时间：
2015
影响因子：
3.6
通讯作者：
Xiao Zhisong
中科院分区：
文献类型：
--
作者：
Zhang Feng;Bi Zhuanfang;Huang Anping;Xiao Zhisong
采用传统的淬火熔体工艺制备了掺镨TeO2-BaF2-NaF玻璃。利用Judd-Ofelt （JO）理论研究了其光吸收光谱。计算了辐射跃迁概率和分支比。1d2→3f4和3p0→3f2发射跃迁的分支率均在40%以上。在325 nm泵浦下观察到Pr3+在可见光波段的荧光。讨论了能量传递和浓度淬火。由于1d2→1g4和3h4→3f4跃迁之间的交叉弛豫，1d2的发射猝灭速度明显快于3p0，这为600 nm左右发射波段的红移提供了合理的解释。测量了3p0能级的衰减曲线。在掺杂率为0.5 mol% Pr3+的样品中，最大寿命为21.5 μs。所制备的玻璃是激光应用的潜在候选者。
Praseodymium doped TeO2–BaF2–NaF glasses were prepared by conventional quenching melt technique. Optical absorption spectra have been investigated using Judd–Ofelt (JO) theory. Radiative transition probabilities and branching ratios were calculated. The branching ratios for the1D2→3F4and3P0→3F2emission transitions are above 40%. The fluorescence of Pr3+in the visible bands was observed under 325 nm pumping. The energy transfer and concentration quenching have been discussed. The1D2emission quenches much faster than those of3P0due to the cross-relaxation between1D2→1G4and3H4→3F4transitions, which provides an appropriate interpretation for the red shift of emission band around 600 nm. The decay curves of3P0level are measured. In 0.5 mol% Pr3+doped sample, we obtained maximum lifetime is 21.5 μs. The prepared glasses are potential candidates for laser applications.