Abstract
Erbium doped tellurite glasses (TeO2+Li2O+TiO2) were prepared by conventional melt-quenching method to study the influence of the Er3+ concentration on the luminescence quantum efficiency (η) at 1.5μm. Absorption and luminescence data were used to characterize the samples, and the η parameter was measured using the well-known thermal lens spectroscopy. For low Er3+ concentration, the measured values are around 76%, and the concentration behavior of η shows Er–Er and Er–OH− interactions, which agreed with the measured lifetime values.
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