Luminescence quantum efficiency at 1.5 mu m of Er3+-doped tellurite glass determined by thermal lens spectroscopy

M. S. Figueiredo, Fabio A. Santos, Keizo Yukimitu, João C. Silos Moraes, Junior R. Silva, Mauro L. Baesso, Luiz A. Oliveira Nunes, Luis H. da Cunha Andrade e Sandro M. Lima

OPTICAL MATERIALS – Volume: 35; Issue: 12; Pages: 2400-2404; DOI: 10.1016/j.optmat.2013.06.041

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 (eta) at 1.5 mu m. Absorption and luminescence data were used to characterize the samples, and the eta 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 eta shows Er-Er and Er-OH- interactions, which agreed with the measured lifetime values.

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