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- W2044433073 abstract "Powerful visible luminescence in a Gadolinium Gallium Garnet (GGG) crystal, co-activated with Yb3+ (~15 at.%) and Ho3+ (~0.1 at.%) ions, is investigated under CW laser diode pumping (lambda = 938 and 976 nm). The main visible emission band is observed in the green with its peak at lambda ~540 nm) and measured to be about 10% with respect to Yb3+ IR luminescence (lambda ~1000 nm). Red (lambda ~650 nm) and near-IR (lambda ~755 nm) emission bands are also observed but are weaker (about 3-5%). Analysis of the crystal absorption and luminescence spectra allows one to conclude that Yb3+ - Ho3+ stepwise up-conversion is the mechanism explaining the phenomenon. Ho3+ ions embedded in the crystal in small concentration are shown to form an effective reservoir for energy transferred from the excited Yb3+ subsystem and to be an efficient source of the visible emission." @default.
- W2044433073 created "2016-06-24" @default.
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- W2044433073 date "2002-08-12" @default.
- W2044433073 modified "2023-09-26" @default.
- W2044433073 title "Powerful visible (530�??770 nm) luminescence in Yb,Ho:GGG with IR diode pumping" @default.
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- W2044433073 doi "https://doi.org/10.1364/oe.10.000832" @default.
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