【摘要】 研究了不同摩尔分数Tm3+掺杂下Tm3+/Ho3+共掺碲酸盐玻璃在2.0μm处的发光特性。此发光包括两个过程:Tm3+之间的交叉弛豫过程;通过Tm3+与Ho3+之间的能量转移,将能量传递给Ho3+而使Ho3+跃迁至5I7能级上产生布居,当Ho3+跃迁回基态时则发出波长为2.0μm的光。计算了Tm3+的交叉弛豫速率,并根据速率方程分析了Tm3+的交叉弛豫机理。结果表明:随着Tm3+浓度增加,交叉弛豫逐渐增强;2.0μm处发光的强度逐渐增强。证明了在Tm3+/Ho3+共掺情况下,2.0μm处的发光强度取决于Tm3+的交叉弛豫强度。更多还原

【Abstract】 The emission properties at around 2.0 μm in Tm3+/Ho3+ co-doped tellurite glasses with different mole fractions of Tm3+ were investigated.The emission at 2.0 μm is generated through two processes:the cross-relaxation between Tm3+,and the holmium particles population to 5I7 via the energy transfers from Tm3+ to Ho3+.After Ho3+ is transited back to the ground state,light at wave-length of 2.0 μm is emitted.The cross-relaxation rates were calculated and the cross-relaxation mechanism was analyzed based on the equations of cross-relaxation rates.The results show that the cross-relaxation gradually becomes stronger with the increase of the molar fraction of Tm3+.The 2.0 μm emission intensities are also increased with the molar fraction of Tm3+.This illustrates that in the situation of Tm3+/Ho3+ co-doping,an intensity of 2.0 μm emission depends on the cross-relaxation intensity of Tm3+.更多还原