Excited states dynamics in the ternary ytterbium halides

Joanna Cybinska 2Janina Legendziewicz 2Georges Boulon 1Gerd Meyer 3

1. Laboratoire de Physico-Chimie des Matériaux Luminescents, UMR 5620 du CNRS (UCBL), 10 rue A.M. Ampere, Villeurbanne 69622, France
2. Wrocław University, Faculty of Chemistry, 14 F. Joliot-Curie, Wrocław 50-383, Poland
3. Institut für Anorganische Chemie, Universität zu Köln, Greinstrasse 6, Köln D-50939, Germany

Abstract

Interest in Yb3+-doped materials has been increasing with advances of high-performance in GaAs laser diode which are ideally suited for pumping the Yb3+ ion between 905 and 980 nm [1]. Yb3+ is indeed the most promising ion that can be used in a non-Nd3+ laser in the near-IR.

The purpose of this work is to present and discuss spectroscopic properties of Yb3+ in K2LaX5 : (X= Cl, Br, I) hosts grown by the Bridgman method according to the procedure described in [2, 3]. The structural characterization was made for the obtained crystals.

Spectroscopic measurements useful for laser applications, high resolution absorption, emission spectra as well as decay time at 293 K, 77 K and 4 K were investigated. The interpretation of Stark levels were done by using Raman and IR absorption spectra to select electronic and vibronic lines. Upconversion process by non-radiative energy transfer to RE unexpected impurity ions as well as Yb3+ pairing and clustering are expected in these hosts.

[1] T.Y. Fan, IEEE J. Quantum Electron 29 (1993) 1457.

[2] G. Meyer, Th. Staffel, Z. anorg. Allg.Chem. 532 (1986) 31

[3] J. Legendziewicz, J. Cybinska, G. Meyer, Optical Materials, 24 (2003) 197

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Presentation: poster at E-MRS Fall Meeting 2005, Laser Ceramic Symposium, by Joanna Cybinska
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-07-07 09:30
Revised:   2009-06-07 00:44
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