One-color sequential pumping of the 4f5d bands in Pr-doped yttrium aluminum garnet
作者： Joseph Ganem , W.M. Dennis , W.M. Yen
DOI: 10.1016/0022-2313(92)90250-D
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摘要: Abstract We report on a method for populating the 4f5d bands in Pr-doped yttrium aluminum garnet (Pr 3+ :YAG) through one-color twp-photon absorption process. Broad ultraviolet emission (between 300 and 400 nm) is obtained by pumping crystal with source between 470 490 nm. The dynamics of two-photon process studied monitoring transient rise decay fluorescing populations under chopped CW excitation. data show that two photons are absorbed sequentially either 3 P 1 or 0 level acting as metastable intermediate state. An excitation spectrum 314 nm from lowest band compared to 615 levels. Strong enhancement UV occurs when laser resonant transitions A model sequential proposed. predicts population ions indirectly controlled energy transfer processes involving D 2
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