Optical absorption and spectroscopic characterization of Er3+ ions in lead molybdate crystals

The main spectroscopic characteristics of PbMoO4:Er3+ crystal, including the probabilities of the intermultiplet transitions and the radiative lifetimes of Er ions in the crystal based on the analysis of (π- and σ-) polarized absorption spectra using the Judd-Ofelt theory, are determined. The effective Judd-Ofelt parameters obtained for Er3+ ions in PbMoO4 crystal are Ω2=4.10x10-20 cm2, Ω4=0.51x10-20 cm2, Ω6=0.20x10-20 cm2. A comparison of the calculated radiative lifetimes with experimentally measured luminescence decay times is carried out. The experimental diagrams of the Stark sublevels of some multiplets of Er3+ ions in PbMoO4 crystal are obtained and the optical transitions between them are identified. (author)