Abstract
The optical properties of Cr 3+ ion in heavy-metal fluoride ZBLA, and BIGaZYT glasses are presented. The thermal quenching of the Cr 3+ broad band luminescence is discussed in terms of the quantum mechanical single configurational coordinate (QMSCC) model using the Struck and Fonger method. A reasonably good agreement with experimental data is achieved. Finally, the analysis of the time evolution of emission spectra provides evidence for the assumption of two distinguishable distributions of Cr 3+ sites in these glasses.
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