论文部分内容阅读
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。
The Yb3 + and Tm3 + co-doped KY (WO4) 2 crystals were grown by the top seed pulling (TSSG) method and the absorption spectra of the crystals in the range of 290 ~ 1200 nm were measured at room temperature. Based on the up-conversion model, the mechanism of energy transfer from Yb3 + to Tm3 + in the crystal was studied and the transition energy level in the crystal was identified. A simple rate equation was established. It is calculated that the energy transfer efficiency of Yb3 + to Tm3 + ions is close to 1. The wavelength of Tm3 + ions was observed at 476 nm blue upconversion luminescence at 974 nm laser diode pumping. Using Fadenbrug-luechtbauer method to calculate the 1G4 to 3H6 level transition emission cross-sectional area, the maximum emission cross-sectional area of about 1.51 × 10-20cm2.