Abstract.
Ultraviolet upconversion fluorescence band (260–350 nm) has been observed from Pr3+:Y2SiO5 pumped by Ar+ ion laser (488 nm). Power dependence of the fluorescence emitted from 4f5d, 3P0 and 1D2 were measured. The upconversion mechanism was analyzed using the rate equations with a simplified three level model. It appears that excited state absorption (ESA) is the dominant upconversion process for lower Pr3+ concentration and energy transfer upconversion (ETU) is dominant for higher Pr3+ concentration.
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Sun, C., Li, J., Hu, C. et al. Ultraviolet upconversion in Pr3+:Y2SiO5 crystal by Ar+ laser (488 nm) excitation. Eur. Phys. J. D 39, 303–306 (2006). https://doi.org/10.1140/epjd/e2006-00102-7
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DOI: https://doi.org/10.1140/epjd/e2006-00102-7