Publicação: Negative nonlinear absorption in Er3+-doped fluoroindate glass
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Data
1998-08-15
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American Institute of Physics (AIP)
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Resumo
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. (C) 1998 American Institute of Physics. [S0021-8979(98)07816-5].
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Inglês
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Journal of Applied Physics. Woodbury: Amer Inst Physics, v. 84, n. 4, p. 2263-2267, 1998.
