Negative nonlinear absorption in Er3+-doped fluoroindate glass

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

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Abstract

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
Volume84
Issue number4
DOIs
StatePublished - 15 Aug 1998

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