Spectroscopic characterization of Yb3+- doped YLiF4 laser single crystals grown by the Czochralski method A. Bensalah, Y. Guyot, A. Brenier, H. Sato, T. Fukuda et G. Boulon J. Phys. IV France, 119 (2004) 125-127 DOI: 10.1051/jp4:2004119021