On observation of the downconversion mechanism in Er3+/Yb3+ co-doped tellurite glass using thermal and optical parameters
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Data
2015-01-01
Autores
Figueiredo, M. S.
Santos, F. A.
Yukimitu, K. [UNESP]
Moraes, J. C. S. [UNESP]
Nunes, L. A. O.
Andrade, L. H. C.
Lima, S. M.
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Elsevier B.V.
Resumo
In this work we report the observed downconversion (DC) mechanism in Er3+/Yb3+-codoped tellurite glasses (in mol%, 80TeO(2)-10Li(2)O-10TiO(2)). The samples were synthesized by the conventional melt-quenching method and then studied using optical spectroscopy and thermal lens spectroscopy (TLS). These characterizations enabled investigation of the radiative and nonradiative processes involved in energy transfer from erbium to ytterbium. The visible Er3+ fluorescence intensities decreased as a function of the Yb3+ concentration, and there was a corresponding increase in the ytterbium emission at around 980 nm. Simultaneously, there was a reduction in the heat-generated due nonradiative decays (similar to 21%) when ytterbium was added. This temperature change was measured by TLS measurements and the results corroborate with the indicated by spectroscopic interpretation. (C) 2014 Elsevier B.V. All rights reserved.
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Palavras-chave
Tellurite glasses, Downconversion process, Energy transfer, Efficiency, Optical spectroscopy, Thermal lens spectroscopy
Como citar
Journal Of Luminescence. Amsterdam: Elsevier Science Bv, v. 157, p. 365-370, 2015.