Abstract
The optical properties of trivalent chromium ions in ZBLA glass have been studied for different concentrations of Cr 3+ . Optical absorption, luminescence and lifetimes were investigated in a wide temperature range. Analysis of lifetime data, emission and time resolved spectra have yielded the following results. There are two kinds of metal sites characterized by two gaussian emissions and two lifetimes, the higher energy gaussian being associated with the long emission lifetime. The two sites have the same thermal quenching mechanism independent of concentration
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