Abstract
The optical properties of Cr3+ ions in lead-based fluoride glasses (PBI, PZG) have been investigated. Optical absorption, emission, lifetimes, and time resolved spectra were measured. The thermal quenching of the broadband emission is discussed in terms of the quantum mechanical single configurational coordinate (QMSCC) model using the Struck and Fonger method, and a good agreement with the experimental results is obtained. In order to correlate glass matrix composition with emission spectral properties, detailed time-resolved measurements have been performed. The obtained results provide a first insight into a possible site distribution of Cr3+ in these glasses.
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