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- W2521304878 abstract "Optically transparent Er 3+ and Eu 3+ doped (less than 1.5 mol% Er 2 O 3 and Eu 2 O 3 ) glass ceramics based on the system K 2 O-MgO-Nb 2 O 5 -TeO 2 have been successfully prepared for the first time. Addition of Er 3+ and Eu 3+ is effective for the formation of a crystalline phase showing second harmonic generation. Fluorescence spectra of Er 3+ and Eu 3+ in glass ceramics are almost similar to those in precursor glasses. The intensity of frequency upconversion fluorescence at around 550 nm due to the 4 S 3/2 → 4 I 15/2 transition of Er 3+ in the glass ceramics is strong compared with that in their precursor glass. From the phonon sideband spectra associated with 5 D 2 → 7 F 0 transition of Eu 3+ it is found that the phonon energy for transparent glass ceramics is smaller than that in the glasses, indicating that the multiphonon relaxation rate of Er 3+ and Eu 3+ present in TeO 2 based glass ceramics is smaller than that in the corresponding TeO 2 based glasses. Whether Er 3+ and Eu 3+ are incorporated into the crystalline phase or not is unclear the present study gives a new possibility for optical applications of transparent TeO 2 based glass ceramics." @default.
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- W2521304878 date "1999-12-01" @default.
- W2521304878 modified "2023-09-24" @default.
- W2521304878 title "Preparation and optical properties of transparent tellurite based glass ceramics doped by Er3+ and Eu3+" @default.
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