Negative nonlinear absorption in Er3+-doped fluoroindate glass

W. Lozano B., Cid B. De Araújo, L. H. Acioli, Y. Messaddeq

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


We report the observation of negative nonlinear absorption in fluoroindate glasses doped with erbium ions. The pumping wavelength is 800 nm which is doubly resonant with Er3+ ions transitions. A large nonlinear intensity dependence of the optical transmittance and strong upconverted fluorescence are obtained. The dependence of the upconverted fluorescence intensity with the laser power is described by a system of coupled-rate equations for the energy levels' populations.

Original languageEnglish
Pages (from-to)2263-2267
Number of pages5
JournalJournal of Applied Physics
Issue number4
StatePublished - 15 Aug 1998
Externally publishedYes


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