A spectroscopic study of Yb3+ ions in YAl3(BO3)(4) laser crystals is presented. Polarized absorption and site selective spectroscopy experiments at low temperature have been used to determine the presence of two different Yb3+ centres in this host crystal in the concentration range 0.2-9 at.%. The contribution of these centres to the absorption spectra has been found to be dependent on the total Yb3+ concentration, and the Stark energy level diagrams corresponding to the different Yb3+ centres have been determined. The importance of electron-phonon coupling, in the optical transitions of Yb3+ ions has been also pointed out.
Spectroscopic study of Yb3+ centres in the YAl3(BO3)4 nonlinear laser crystal
SPEGHINI, Adolfo;BETTINELLI, Marco Giovanni
2003-01-01
Abstract
A spectroscopic study of Yb3+ ions in YAl3(BO3)(4) laser crystals is presented. Polarized absorption and site selective spectroscopy experiments at low temperature have been used to determine the presence of two different Yb3+ centres in this host crystal in the concentration range 0.2-9 at.%. The contribution of these centres to the absorption spectra has been found to be dependent on the total Yb3+ concentration, and the Stark energy level diagrams corresponding to the different Yb3+ centres have been determined. The importance of electron-phonon coupling, in the optical transitions of Yb3+ ions has been also pointed out.
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