J. Phys. IV France
Volume 125, June 2005
Page(s) 193 - 196

J. Phys. IV France 125 (2005) 193-196

DOI: 10.1051/jp4:2005125045

Thermal lens determination of fluorescence quantum efficiency of 3F4 level of Tm3+ ions in solids

S.L. Oliveira1, 2, S.M. Lima1, 3, T. Catunda1, H. Vargas2, L.A.O. Nunes1, J.H. Rohling4, A.C. Bento4 and M.L. Baesso4

1  Instituto de Física de São Carlos, Universidade de São Paulo, CP 369 CEP 13560 - 970, São Carlos, SP, Brazil.
2  Universidade Estadual do Norte Fluminense, Av. Alberto Lamego 2000, CEP 28013-600, Campos dos Goytacazes, RJ, Brazil
3  Universidade Estadual do Mato Grosso do Sul - UEMS, Grupo de Espectroscopia Óptica e Fototérmica, CP 351, Dourados, MS, Brazil.
4  Departamento de Física, Universidade Estadual de Maringá, Av. Colombo 5790, CEP 87020-900, Maringá, PR, Brazil

In this work, a method based on thermal lens spectrometry is proposed to determine the fluorescence quantum efficiency ($\eta$) of the 3F4 level ($\sim$1.8$\mu$m emission) of Tm-doped solids. It was applied to Tm-doped water free low silica calcium aluminate glasses. The obtained $\eta$ value for the glasses with high Tm content was approximately 30%, which is in agreement with the achieved $\eta$ values from ratio between radiative and experimental lifetimes.

© EDP Sciences 2005