在三种掺Cr~(3+)的玻璃中作了吸收光谱,荧光光谱和荧光寿命的测定。根据配位场理论对光谱数据作了分析和计算,理论值与实验值相符合。实验还发现从磷酸盐玻璃→氟磷酸盐玻璃→氟化物玻璃的静电参量B值依次序上升。反映了中心过渡金属离子与配位体之间化学键的共价性降低,离子性增加。相应的吸收和荧光峰值位置向短波方向移动。同时荧光强度增加,荧光寿命延长,温度猝灭减弱。说明无辐射跃迁几率降低。本文还对磷酸盐玻璃中Mo~(3+)的吸收光谱和荧光光谱作了研究报道。与Cr~(3+)相比,Mo~(3+)的配位场强Dq要大得多,Cr~(3+)的近红外发光是属于4~T(2g)→~4A(2g),而Mo~(3+)则是~E→~4A(2g)的发射。

Absorption, fluorescence spectra and lifetime mesurements of Or3+ in the three kinds of glass bases have been performed, and the analysis and calculation of the speotral data based on the ligand field theory have been carried out. The results are consistent with, the experiments. Moreover, it is found that in order of phosphate -> fluorophosphate —fluoride glasses the joiiic contribution of the chemical bond between the central activated ions and ligands increases gradually with, the increase of Racah Β parameters. Corresponding peak positions of absorption spectra and fluorescence spectra shift to shorter wavelength. Meanwhile, the experiments also show that the increase of fluorescence intensity and lifetime and. the weakening of temperature quenching effect of glassed from phosphate to fluorophosphate can be considered as the deoreage of non-radiation probability. In this paper, absorption and fluorescence spectra of Mo3+ in phosphate glass have also been studied,The ligand field strength DQ of Mo3+ is larger in comparison with that of Gr3+.