Abstract

An efficient Nd3+Yb3+ energy transfer in a new series of alkali-free barium-alumino-metaphosphate glasses with a transfer efficiency reaching up to 95% has been reported here. It is due to the effective phonon assistance arising with the excellent matching of the present host phonon energy with the energy mismatch between Nd3+ (F43/2) and Yb3+ (F25/2) excited levels. The energy transfer microparameters for Nd3+Yb3+ forward and back energy transfers are estimated from the spectral data analysis. A parameter, ΦET (=CDANd-Yb/CDANd-Nd), is proposed as a quantitative measure of sensitization ability per unit loss of the donor. The parameter is found to be highest for the presently reported barium-alumino-metaphosphate glasses.

© 2010 Optical Society of America

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