Abstract
Abstract The absorption spectra of Ce 3+ , Nd 3+ , Eu 3+ , Tb 3+ , Er 3+ , Tm 3+ and Yb 3+ rare earth (RE) impurity ions incorporated in Sr x Ba 1– x Nb 2 O 6 (SBN) crystals were studied in a wide spectral range from the visible to the mid‐infrared. On the basis of the analysis of the Ce 3+ absorption line shapes and their polarization properties the conclusion was drawn about the incorporation of multiple Ce 3+ centres mostly in the position A1 of the crystal lattice of SBN. From the observed temperature dependence of the Ce 3+ absorption line broadening the electron coupling strength (160 cm –1 ) and effective phonon energy (300 cm –1 ) were determined. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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