Thermal lens determination of fluorescence quantum efficiency of 3F4 level of Tm3+ ions in solids S.L. Oliveira, S.M. Lima, T. Catunda, H. Vargas, L.A.O. Nunes, J.H. Rohling, A.C. Bento et M.L. Baesso J. Phys. IV France, 125 (2005) 193-196 DOI: 10.1051/jp4:2005125045