Fluoroindate glasses co-doped with Pr3+/Er3+ for near-infrared luminescence applications
Wojciech A. Pisarski, Joanna Pisarska, Marta Kuwik, Marcin Kochanowicz, Jacek Żmojda, Piotr Miluski, Agata Baranowska, Jan Dorosz, Magdalena Leśniak, Dominik Dorosz
Abstract
Abstract Fluoroindate glasses co-doped with Pr 3+ /Er 3+ ions were synthesized and their near-infrared luminescence properties have been examined under selective excitation wavelengths. For the Pr 3+ /Er 3+ co-doped glass samples several radiative and nonradiative relaxation channels and their mechanisms are proposed under direct excitation of Pr 3+ and/or Er 3+ . The energy transfer processes between Pr 3+ and Er 3+ ions in fluoroindate glasses were identified. In particular, broadband near-infrared luminescence (FWHM = 278 nm) associated to the 1 G 4 → 3 H 5 (Pr 3+ ), 1 D 2 → 1 G 4 (Pr 3+ ) and 4 I 13/2 → 4 I 15/2 (Er 3+ ) transitions of rare earth ions in fluoroindate glass is successfully observed under direct excitation at 483 nm. Near-infrared luminescence spectra and their decays for glass samples co-doped with Pr 3+ /Er 3+ are compared to the experimental results obtained for fluoroindate glasses singly doped with rare earth ions.