本文用激光选择激发时间分辨光谱技术,研究了高Nd~(3+)浓度的磷酸盐玻璃的浓度猝灭和离子间激发能量的扩散和转移.结果表明这种材料具有弱的浓度猝灭,猝灭速率与X成正比.激光选择激发时间分辨光谱表明在No=4.2×10~(21)cm~(-3)的NP-1玻璃中,Nd~(3+)离子处于各种不同的局域配位场中,这些离子间通过偶极-偶极相互作用产生激发能量的转移和扩散.在77～150K的温度范围内,转移过程涉及δ=330cm~(-1)的热激活能量,并通过实验数据和理论的拟合估计了几种有关的能量转移参数的大小.

In this paper, the laser-selective excited time-resolved spectroscopy technique is used to investigate the concentration quenching and energy diffusion and transfer between Nd3+ ions in the phosphate glasses, in which the composition and the Nd3+ concentration are similar to those of Nd x Y1-x P5O14 crystal. The experimental result shown that this material is with weak concentration quenching, and the quenching rate proportional to X. The laser-selective excited timo-resolvod spectra shows that Nd ions located in various different local crystal-field sites In NP-1 glass with N0=4.2×1021 cm-1. The energy transfer and diffusion between Nd3+ Ions take place through forced electric dipole-dipole interaction. In tomporature range of 77~150 K, tho transfer process invovings a thermal activation onorgy of 330cm-1 was found. By fitting experimental data with theory, several energy transfer parameters are estimatod.