Precise determination on the upconversion processes of the ultraviolet upconversion fluorescence of Ho^3+-doped Y_2O_3 ceramic by excitation of a 532-nm continuous-wave laser
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2008 ◽
Vol 22
(16)
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pp. 1589-1597
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2006 ◽
Vol 8
(8)
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pp. 672-676
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