Optical properties of erbium doped antimony based glasses: Promising visible and infrared amplifiers materials

Highly stable glasses in the (70?-?x)Sb2O3?20Na2O?10ZnO?xEr2O3 (x?=?0.25, 0.5, and 1.0?mol%) system have been prepared and investigated by UVVisNIR absorption, near infrared photoluminescence and time-resolved spectroscopy. JuddOfelt study has been used to determine the intensity parameters (O2, O4, and O6), spontaneous emission probabilities, branching ratios, and radiative lifetimes (tR) related to the corresponding optical transitions of Er3+ ions. Details of the emission at similar to 1530?nm and spectroscopic characteristics such as the stimulated emission cross-section (se), effectiveband width (??eff), quantum efficiency, and the optical gain have been summarized, accounting the role of the increased Er content. The obtained results indicate that these new low phonon energy glasses could be used as a laser medium and for optical amplification in the 1.5?mu m region. In particular, the composition containing 0.5?mol% Er2O3 exhibits optimal values of O2 (4.5?x?10-20?cm2), ??eff?=?57?nm, se?=?7.28?x?10-21?cm2, tmeas (3.36?ms), and quantum efficiency of the 4I13/2 level of Er3+ ions similar to 71%.