Abstract
An investigation was made of the kinetics of the luminescence due to 4I11/2 → 4I15/2 and 4I13/2 → 4I15/2 transitions in the Er3+ ion in yttrium erbium aluminum garnet crystals subjected to strong resonant excitation argon laser radiation (λ = 4880 nm). The efficiency of the cooperative process resulting in nonlinear quenching of the luminescence from the 4I13/2 level and sensitization of the 4I11/2 level was estimated. The influence of this process on the kinetics of lasing as a result of the 4I11/2 → 4I13/2 transition (λ = 2.94 μ) was analyzed.
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