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The upconversion emission of Er3+:PLZT transparent ceramic was investigated at different temperatures from 10 to 300K. Emission bands around 540, 564 and 682nm corresponding to transitions from 2H11/2, 4S3/2, and 4F9/2 to 4I15/2 were observed. As the measurement temperature was increased, the intensities of the 564 and 682nm peaks decreased, while that of the 540nm peak increased. Based on the rate...
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