Effect of Eu3+ ions on optical and fluorescence studies of Nd3+ ions doped zinc-lithium fluoroborate glasses

Abstract Nd 3+ single and Nd 3+ /Eu 3+ co-doped ZnF 2 -LiF-Na 2 CO 3 -Bi 2 O 3 -H 3 BO 3 , zinc lithium fluoroborate (ZLFNBiB) glasses with good optical properties have been prepared by high temperature melt-quenching method. The single and co-doped samples exhibiting emission bands centered at 874, 1058 and 1330 nm under the excitation of 808 nm laser diode (LD). The photoluminescence spectra for co-doped glasses were recorded under the 394 and 464 nm of xenon lamp as excitation sources. The Judd-Ofelt intensity parameters were calculated from optical absorption spectrum and radiative parameters from the emission spectrum of 0.5 mol% of Nd 3+ doped glass. The large stimulated emission cross-section and branching ratio values are evaluated and compared with the other Nd 3+ doped systems, the energy transfer from Eu 3+ to Nd 3+ ions is observed and thoroughly discussed from NIR emission spectra (λ exc = 394 nm) of co-doped glasses. The decay profiles are recorded for all the concentrations of co-doped samples and the experimental lifetimes (τ exp ) were obtained from the decay profiles. The binding energy and Urbach energy values of prepared glass samples were calculated and discussed.