Abstract
The neodymium doped alkali bismuth phosphate (ABiP:Nd3+) glasses with the chemical composition (65 − x)P2O5 + 15Bi2O3 + 10Li2O + 10Na2O + xNd2O3 (where x = 0.1, 0.3, 0.5, 1.0, 1.5, 2.0 in mol%) have been prepared by the conventional melt quenching technique and characterized through various spectroscopic measurements. The spectroscopic parameters have been determined from the absorption and emission measurements together with Judd-Ofelt analysis. Addition of bismuth oxide to the phosphate matrix significantly increases radiative parameters such as radiative transition probability, measured lifetime, quantum efficiency and stimulated emission cross-sections. Three emission lines at 874, 1053, 1323 nm have been registered for Nd3+ in alkali bismuth phosphate glasses, which corresponds to the transitions originating from 4F3/2 level to the 4I9/2, 4I11/2 and 4I13/2 levels of Nd3+ ion, respectively. The quite larger values for laser parameters like peak emission cross-sections, gain bandwidth, figure of merit, optical gains and saturation intensities have been obtained for 4F3/2 → 4I11/2 transition of Nd3+ ions in alkali bismuth phosphate glasses, which is promising for NIR laser application at 1.053 μm.
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