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Proceedings Paper

UV-visible luminescence properties of the broad-band Yb:CALGO laser crystal
Author(s): A. Jaffres; S. K. Sharma; P. Loiseau; B. Viana; J. L. Doualan; R. Moncorgé
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Paper Abstract

Yb:CALGO is now recognized to exhibit outstanding properties for the production of high-power and ultra-short laser pulses in the near infrared spectral range. However, various UV-visible absorption bands can be also observed due to different types of charge transfer mechanisms. Some of them are assigned to the formation of color centers due to small polarons and others to O2-→Yb3+ ligand-to-metal charge transfer (LMCT) transitions. The former can be removed by using adequate thermal treatments. The latter are intrinsic and they are very intense with cross sections of about two orders of magnitude larger that the near infrared ones. In fact, such LMCT absorption bands are responsible for relatively large changes of ionic polarizabilities and to non-negligible pseudo-nonlinear changes of refractive indices which should certainly affect the laser properties of Yb:CALGO at high pump power levels.

Paper Details

Date Published: 16 March 2015
PDF: 7 pages
Proc. SPIE 9359, Optical Components and Materials XII, 93590V (16 March 2015); doi: 10.1117/12.2075587
Show Author Affiliations
A. Jaffres, Insitut de Recherche Chime-Paris, CNRS, Chimie-Paristech (France)
S. K. Sharma, Insitut de Recherche Chime-Paris, CNRS, Chimie-Paristech (France)
P. Loiseau, Insitut de Recherche Chime-Paris, CNRS, Chimie-Paristech (France)
B. Viana, Insitut de Recherche Chime-Paris, CNRS, Chimie-Paristech (France)
J. L. Doualan, Ctr. de Recherche sur les Ions, les Matériaux et la Photonique, CNRS (France)
R. Moncorgé, Univ. de Caen (France)

Published in SPIE Proceedings Vol. 9359:
Optical Components and Materials XII
Shibin Jiang; Michel J. F. Digonnet, Editor(s)

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