A study of the quantum efficiency of multichannel relaxation in LiNbO3:Yb, Er crystals

Abstract

Luminescence spectra of gradient-activated LiNbO₃:Yb, Er crystals with predefined concentration profiles of the optical centers are studied in different spectral regions. The process of electronic excitation energy transfer in the Yb³⁺–Er³⁺ system inside the LiNbO₃ matrix is calculated and dependences of the quantum efficiency of the up-conversion processes for the green and red luminescences of erbium ions on the time of excitation energy deactivation are obtained.