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- W1588792834 abstract "As previously reported, a selectively strong green emission due to the Ho3+: (5F4, 5S2)→5I8 transitions is observed in Nd3+–Ho3+ co-doped ZrF4-based fluoride glasses under 800 nm excitation. As an attempt to more enhance Ho3+ up-conversion luminescences in the Nd3+–Ho3+ co-doped ZrF4-based glasses, Yb3+ ions were added to the glasses. As a result it was found that, in 800 nm excitation of 60ZrF4⋅30BaF2⋅(8−x)LaF3⋅1NdF3⋅xYbF3⋅1HoF3 glasses (x=0 to 7), sensitized up-conversion luminescences are observed at around 490 nm (blue), 545 nm (green), and 650 nm (red), which correspond to the Ho3+: F35→5I8, (5F4, 5S2)→5I8, and F55→5I8 transitions, respectively. The intensities of the green and red emissions in a 3 mol % YbF3-containing glass were about 50 times stronger than those in no YbF3-containing glass. This is based on sensitization due to Yb3+ ions. In particular, the green emission is extremely strong so that the Nd3+–Yb3+ –Ho3+ co-doped ZrF4-based glasses have a high possibility of realizing a green up-conversion laser glass. Up-conversion processes for the blue, green, and red emissions were two-photon processes assisted by Nd3+→Yb3+→Ho3+ energy transfer. The up-conversion mechanism in the glasses is discussed." @default.
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- W1588792834 date "1999-07-15" @default.
- W1588792834 modified "2023-09-27" @default.
- W1588792834 title "Sensitized Ho3+ up-conversion luminescence in Nd3+–Yb3+–Ho3+ co-doped ZrF4-based glass" @default.
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- W1588792834 doi "https://doi.org/10.1063/1.370822" @default.
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