Effects of up-conversion energy transfer on the decay shapes of the 4F3/2 level of Nd3+ in YAG at high-pump intensities

Voicu Lupei; B. Diaconescu; Aurelia Lupei

doi:10.1117/12.432826

29 June 2001 Effects of up-conversion energy transfer on the decay shapes of the⁴ F_3/2level of Nd³⁺in YAG at high-pump intensities

Voicu Lupei, B. Diaconescu, Aurelia Lupei

Author Affiliations +

Proceedings Volume 4430, ROMOPTO 2000: Sixth Conference on Optics; (2001) https://doi.org/10.1117/12.432826
Event: ROMOPTO 2000: Sixth Conference on Optics, 2000, Bucharest, Romania

Abstract

Experimental data presents a pump intensity dependence of the ⁴F_3/2Nd³⁺ level emission in various hosts; these effects were assigned to the up-conversion processes. A new formalism that takes into account both up- and down-conversion processes and the statistical distribution of acceptors around donor in the case of direct processes is presented. This involves a time dependent of transfer function and two interaction types: dipolar and superexchange. The profile of excitation beam is considered in order to compare theoretical calculations with experimental data. Calculations concerning quantum efficiency as a function on the ratio between up- and down- conversion rates are presented.

Citation Download Citation

Voicu Lupei, B. Diaconescu, and Aurelia Lupei "Effects of up-conversion energy transfer on the decay shapes of the⁴ F_3/2level of Nd³⁺in YAG at high-pump intensities", Proc. SPIE 4430, ROMOPTO 2000: Sixth Conference on Optics, (29 June 2001); https://doi.org/10.1117/12.432826

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