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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.

Fluoroindate glasses co-doped with Pr3+/Er3+ for near-infrared luminescence applications