Abstract
In the work results of research of nonradiative energy transfer processes taking place in the impurity subsystem of the YAG: Er3+-Ce3+ crystal under optical excitations of Er3+ and Ce3+ ions are presented at room temperatures. By means of time-resolved fluorescence spectroscopy, some kinetic characteristics of fluorescence responses of the crystal under optical excitations at 405 and 808 nm wavelengths are investigated. Comparison of the measured characteristics of fluorescence signals at 860, 980 and 1555 nm wavelengths with the theoretical values numerically calculated from appropriate sets of rate equations allowed to estimate the positive contributions of energy transfer processes into population dynamics of energy levels responsible for generation near 1.5 μn of Er3+ active ions in the YAG matrix.
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