Study of luminescent-kinetic properties of various optical devices materials doped with rare earth elements Yb and Er

The luminescent-kinetic properties in the region of 1.5 µm of gradient-activated lith-ium niobate crystals inhomogeneously sensitized by optical Er3+ ions and impurity centers Ce3+, Zn2+ are studied, as well as the synthesized organic coordination compounds with op-tical centers of Yb3+ and Er3+ions are considered. As a result of the studies, it was found that in the samples sensitized with Ce3+ ions, a decrease in the luminescent lifetime of the excited state of 4I13/2 Er3+optical centers was observed. In organic coordination compounds, the opti-cal centers of erbium ions also show a decrease in the luminescent lifetime of the excited state. It was found that the decrease in the luminescent lifetime of the Er optical center in the region of 1.5 µm for LiNbO3:Er, Ce crystals compared to similar values in LiNbO3:Er is determined by the presence of Ce3+ ions in the matrix and the transfer of the electron excitation energy between the impurity centers. The presence of the concentration profile of Zn2+ ions in the crystal matrix of lithium niobate can potentially create conditions for the formation of non-equivalent optical centers for Er ions, similar to the effect on the optical centers of Mg2+nephotorefractive impurity ions. In organic coordination compounds, the decrease in the lifetime of the excited state can be explained by the exchange energy processes between the optical center and the coordination environment of the organic compound. In the investigated organic compounds, the decrease in the luminescent lifetime of Er3 + ions is due to the presence of coordination compounds and the exchange energy processes between the ions.