Araújo, Cid B. deMaciel, G. S.Rakov, N.Messaddeq, Younes [UNESP]2014-05-272014-05-271999-06-02Journal of Non-Crystalline Solids, v. 247, p. 209-214.0022-3093http://hdl.handle.net/11449/65791Non-linear absorption is observed in Er3+-doped fluoroindate glass (in mol% 37InF2:20ZnF2:20SrF2:16BaF2:2GdF2: 2NaF:1GaF3:2ErF3) when the sample is irradiated with a CW laser emitting at 650 nm. An intensity dependence of the optical transmittance is detected. Saturation and sequential absorption of two photons are responsible for the decrease of 50% in the transmittance. The results are explained by simple models which are solved based on rate-equations for the populations of energy levels.209-214engAbsorption spectroscopyContinuous wave lasersDoping (additives)Dye lasersErbiumFluorine compoundsLaser beamsLight absorptionMultiphoton processesNonlinear opticsFluoroindate glassNonlinear absorptionOptical glassArtigo10.1016/S0022-3093(99)00064-2Acesso restrito2-s2.0-03446424962998503841917815