Spectroscopic data on 2-um laser systems

Aurelia Lupei; Voicu Lupei; Carmen Tiseanu

doi:10.1117/1.601022

1 May 1996 Spectroscopic data on 2-um laser systems

Aurelia Lupei, Voicu Lupei, Carmen Tiseanu

Optical Engineering, Vol. 35, Issue 5, (May 1996). https://doi.org/10.1117/1.601022

Some of our recent spectral and energy transfer results on Tm3+-based 2-?m solid state laser systems are presented. Based on experimental data, with an improved algorithm and parameterized crystal field calculations, complete energy level diagrams for Tm3+ in YAG and GGG are obtained. The sets of crystal field parameters could be used to estimate a series of important spectral data for laser emission. A discussion of the spectral characteristics and the nature of Tm3+ multisite structure is also presented. The static spectral modifications in Cr3+ codoped with Tm3+ YAG or GGG crystals, due to mutual crystal field perturbations of the two dopants, are connected with Cr3+-Tm3+ pairs. The high-resolution data offer direct evidence that the Cr31-Tm3+ energy transfer is governed for near neighbor Cr3+(a)-Tm3+(c) pairs by a shortrange, most probably superexchange, interaction. The contribution of multipolar interactions should be considered only for more distant pairs, while at large distances, dipole-dipole interaction is dominant. The data suggest that the sensitization with Cr3+ determines not only an efficient way of transfer of excitation from the pumping sources to active ions but could produce changes of the spectal and temporal behavior of the latter.

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Aurelia Lupei, Voicu Lupei, and Carmen Tiseanu "Spectroscopic data on 2-um laser systems," Optical Engineering 35(5), (1 May 1996). https://doi.org/10.1117/1.601022

Published: 1 May 1996

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