Abstract
Six 1.0 mol% Nd2O3-doped NaF+ZnO+BaO+TeO2+B2O3 glasses containing single and mixed alkali oxides (K2O, Na2O, Li2O, K2O/Li2O, K2O/Na2O, and Na2O/Li2O) were prepared via melt-quenching approach and optical and NIR (near-infrared) emission traits including fluorescence decay times were explored. In all samples, Na ions comprising glass possesses 53.68 nm ∆λeff (effective bandwidth), 6.16 × 10‒21 cm2σmaxemi(peak emission cross-section), and 3.31 × 10‒26 cm3σmaxemi × ∆λeff (gain bandwidth) for transition 4F3/2→4I13/2 for O-band amplification, and also owns larger σmaxemi, σmaxemi × ∆λeff, and optical gain for 4F3/2→4I11/2 for NIR lasing action at 1.06 μm. Further, K ions constituting glass holds larger full width at half maximum (= 46.23 nm) or better ∆λeff (= 51.62 nm), moderate branching ratios (βR (= 42.37%) and βexp (= 19%)), and higher radiative decay time (= 662 μs) and τmeas (= 76.10 μs) for transition 4F3/2→4I9/2 for ∼0.9 μm laser operation.
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