Abstract
We develop two Er3+-ions-doped Phosphate glass systems, 69 P2O5-10Gd(2)O(3)-10BaO-10ZnO-1Er(2)O(3) and 69 P2O5-10GdF(3)-10BaO-10ZnO-1Er(2)O(3), labeled as ZBaFEr and ZBaOEr, respectively, by the melt-quenching technique and study systematically their physical, optical, and luminescence properties such as densities, refractive indexes, ultraviolet-visible near-infrared (UV-Vis-NIR) absorption, photoluminescence spectra in Vis-NIR region, CIE coordinates and lifetime. The absorption spectra revealed the Er3+ peaks at 378, 405, 451, 489, 522, 652, 803, 978, and 1537 nm, attributed to the transition from I-4(15/2) level to (4)G(11/2), (2)G(9/2), F-4(5/)2, F-4(7/)2,H-4(1)1/2, F-4(9/2), I-4(9/2), I-4(11/2) and I-4(13/2) levels, respectively. We find that at 380-nm excitation, the emission peak at 1543 nm in the near-infra-red (NIR) region has a higher intensity for ZBaFEr than for the ZBaOEr. Furthermore, we employ the Judd-Ofelt (JO) and McCumber theory to study the stimulated emission cross-section for I-4(13/2) -> I-4(15/2) transitions of Er3+ ion. We find the bandwidth-quality [FWHM x sigma(emi)(lambda)] to be 249 and 274 for ZBaOEr and ZBaFEr, respectively. The NIR-emission for both glasses covers the S-, C- and L-band of low-less-communication-window. The present results suggest that these glasses can be potentially used in optical amplifiers and tunable lasers. (C) 2022 Published by Elsevier B.V.