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Luminescence and Upconversion Dynamics of Praseodymium in LiLuF4 Laser Crystals

Published online by Cambridge University Press:  01 February 2011

Gönül Özen ,
John M Collins ,
Ottavio Forte ,
Misha Meylman ,
R. Yu Abdulsabirov  and
Baldassare Di Bartolo
Gönül Özen
Affiliation:
Department of Physics, Boston College, Chestnut Hill, MA, USA. Department of Physics, Istanbul Technical University, Istanbul, Turkey.
John M Collins
Affiliation:
Department of Physics and Astronomy, Wheaton College, Norton, MA, USA.
Ottavio Forte
Affiliation:
Department of Physics, Boston College, Chestnut Hill, MA, USA.
Misha Meylman
Affiliation:
Department of Physics, Boston College, Chestnut Hill, MA, USA.
R. Yu Abdulsabirov
Affiliation:
Department of Physics, Boston College, Chestnut Hill, MA, USA.
Baldassare Di Bartolo
Affiliation:
Department of Physics, Boston College, Chestnut Hill, MA, USA.
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Abstract

We have investigated the spectroscopic properties of Pr 3+ ions in LiLuF 4 laser host doped with 0.5% Pr 3+ ions as a function of temperature. We obtained the luminescence spectra by exciting selectively the sample at 439nm into the 3 P 2 level and at 593nm into the 1 D 2 level. With excitation in the 3 P 2 level we obtained emission only from the 3 P 0 level but not from the 1 D 2 level at all temperatures between 24 and 300K. With excitation into the 1 D 2 level we observed the luminescence emitted by the same level and a strong blue up-conversion emission from the 3 P 0 level. We used the decay pattern inspection to assign spectral lines to specific radiative transitions and to study the dynamics of the excited ions in the crystal. Under direct excitation, the 1 D 2 decay curve is nonexponential at all temperatures, whereas the 3 P 0 decay is exponential only at low temperatures. The experimental data indicate that the 3 P 0 level is populated via upconversion due to mainly energy transfer.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 851: Symposium NN – Materials for Space Applications , 2004 , NN5.4
Copyright
Copyright © Materials Research Society 2005

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References

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