Abstract
This paper reports on luminescence properties of the 1 mol% Sm3 + (4f 5) and Dy3 + (4f9) doped optical glasses in the composition of: 65TeO2-12B2O3-12P2O5-10Li2O –1Sm2O3/1Dy2O3. The measured emission spectrum of Sm3 + glass has revealed four emission transitions at 558 nm (4G5/2→6H5/2), 595 nm (4G5/2→6H7/2), 641 nm (4G5/2→6H9/2), and 701 nm (4G5/2→6H11/2) respectively with 399 nm (6H5/2→6P3/2) as the excitation wavelength. Among them, for more prominent bands, lifetimes have been measured. Regarding the Dy3 + glass, three emissions at 481 nm (4F9/2→6H15/2), 572 nm (4F9/2→6H13/2), and 661 nm (4F9/2→6H11/2) respectively have been recorded with λexci = 386 nm (6H15/2→4I13/2), for the intense emissions lifetime measurements have been carried out. Both the glasses have displayed their potential luminescent performance from the measured spectral results. Under an UV source, Sm3+ glass has shown an reddish-orange emission (595 nm) and Dy3 + glass has revealed yellow emission (572 nm). Energy level schemes relating to the emission mechanisms that are involved in Sm3 + and Dy3 + glasses have been presented.
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