Dependence of the Er2O3 selective emission on the intensity of laser thermal excitation

Abstract

The dependence of the selective emission (SE) spectra of erbium oxide (Er2O3) in the visible and near-IR spectral ranges on the laser excitation intensity at a wavelength of 10.6 μ m is experimentally studied. The intensity ratio for the Er3+ electronic and vibronic transitions in the SE spectra is varied with an increase in the laser intensity to 10 kW/cm2. The mechanism for the multiphonon fluctuation excitation of electronic states and a possibility for the SE application in the observation of the thermo-photo-laser effect are discussed.