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  • Title: Host dependent frequency upconversion of Er3+/Yb3+-codoped bismuth-germanate glasses.
    Author: Lu L, Nie Q, Shen X, Dai S, Xu T, Jin Z, Shen Y, Zhang X.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2007 Aug; 67(5):1228-31. PubMed ID: 17142088.
    Abstract:
    The absorption and upconversion fluorescence spectra of a series of Er3+/Yb3+-codoped xBi(2)O(3)-(90-x)GeO2-10Na(2)O (BGN x, x=31, 36, 41, 46 and 51 mol%) glasses have been studied. Intense green and red emission bands at around 533, 548 and 659 nm, corresponding to the 2H(11/2)-->4I(15/2), 4S(3/2)-->4I(15/2) and 4F(9/2)-->4I(15/2) transitions of Er3+, respectively, were simultaneously observed at room temperature. The dependence of intensities of upconversion emission on excitation power and possible upconversion mechanisms were evaluated and analyzed. The important role of Bi(2)O(3) in upconversion intensity is observed and its influence on the green (533 and 548 nm) and red (659 nm) emissions is compared and discussed. The influence of Bi(2)O(3) on the upconversion emissions has been investigated based on the IR spectra.
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