Abstract
The absorption and fluorescence spectra of YAG crystals doped with praseodymium at 1% level are investigated through dye laser spectroscopy. The spectra can be interpreted as evidence for at least three series of crystallographic sites for Pr3+, but only the transitions which involve the ground state are really complex, that is “multi-sites” like. It is suggested that an electronphonon interaction occurs through resonance with peaks in the density of phonon states and ground state Stark levels in the range 350–750 cm−1. This creates new “vibronic” states and the appearance of a large number of lines for transitions involving ground state especially if laser excitation of the fluorescence is used.
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Antic-Fidancev, E., Lemaitre-Blaise, M., Krupa, J.C. et al. Optical study of praseodymium doped yttrium aluminium garnet. Czech J Phys 38, 1268–1280 (1988). https://doi.org/10.1007/BF01597297
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DOI: https://doi.org/10.1007/BF01597297