Giant non-linear absorption in Er3+-doped fluoroindate glass
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Non-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.
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Absorption spectroscopy, Continuous wave lasers, Doping (additives), Dye lasers, Erbium, Fluorine compounds, Laser beams, Light absorption, Multiphoton processes, Nonlinear optics, Fluoroindate glass, Nonlinear absorption, Optical glass
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Journal of Non-Crystalline Solids, v. 247, p. 209-214.
