Excited states dynamics in the ternary ytterbium halides
|Joanna Cybinska 2, Janina Legendziewicz 2, Georges Boulon 1, Gerd Meyer 3|
1. Laboratoire de Physico-Chimie des Matériaux Luminescents, UMR 5620 du CNRS (UCBL), 10 rue A.M. Ampere, Villeurbanne 69622, France
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 . 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.
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 J. Legendziewicz, J. Cybinska, G. Meyer, Optical Materials, 24 (2003) 197
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