【摘要】 报道了 Tm,Ho双掺 YVO4 晶体中能量传递速率的计算结果 .计算结果表明 :Tm3 + 在 80 5 nm激光泵浦下其交叉弛豫速率随掺杂的浓度不同而不同 ,但对于所研究的样品均具有相当快的速率 ,使得在 3 F4态有显著的粒子数集聚 ;随后 Tm3 + 的 3 F4 向 Ho3 + 的 5I7的能量转移速率也是随掺杂的浓度不同而不同 ,但与前者相比较慢 ,这有利于 Tm3 +对 Ho3 +的有效的敏化 .计算的结果与实验所观测到 Ho3 +的约为 2 μm荧光现象是相符合的更多还原

【Abstract】 In thispaperthe calculated results of crossrelaxation rate between Tm3 + ions and ener- gy transfer rate from Tm3 + to Ho3 + in Tm,Ho co-doped YVO4 crystal were reported. Both of them were the importantparameters forthe evaluation of2 μm laser performance of this material.The re- sults show thatthe cross relaxation rate at LD pumping depends on the doped Tm3 + concentration and has a quite speed for used samples,which will induce a rather large population of 3 F4 manifold,the energy transfer rate from Tm3 + 3 F4 to Ho3 + 5I7has a dependence on their doped concentration too, however the latter was slower than the former,all of thatwere beneficial to the efficient and steady sensitized fluorescence of Ho3 + by Tm3 + .There was a basically consistent between calculated results and experiment investigation of2 μm luminescence.更多还原