Thermal lens determination of fluorescence quantum efficiency of $^3$F$_4$ level of Tm$^{3+}$ ions in solids

S.L. Oliveira; S.M. Lima; T. Catunda; H. Vargas; L.A.O. Nunes; J.H. Rohling; A.C. Bento; M.L. Baesso

doi:doi:10.1051/jp4:2005125045

Issue		J. Phys. IV France Volume 125, June 2005


Page(s)		193 - 196
DOI		https://doi.org/10.1051/jp4:2005125045

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. Oliveira^{1, 2}, S.M. Lima^{1, 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

Abstract
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.

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

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