Synthesis and optical studies on concentration dependent Dy3+ doped lithium-fluoroborophosphate glasses

Abstract

A new series of Dy3+ doped Lithium-fluoroborophosphate glasses were prepared following conventional melt quenching technique and characterized using XRD, optical absorption and luminescence measurements. The nature of the metal-ligand bonding and the electronic band structure has been investigated using the absorption spectra. The Judd-oflet (JO) intensity parameters (Ω2, Ω4 and Ω6) were evaluated and the experimental oscillator strength values are calculated. The luminescence spectra exhibit two visible bands 4F9/2→6H15/2 (Blue) and 4F9/2→6H13/2 (Yellow) respectively. The radiative properties such as peak wavelength, stimulated emission cross-section and effective band width for the emission transition were calculated. The yellow to blue (Y/B) ratios and color coordinates have been calculated from the luminescence spectra and the utility of the present glasses for blue laser application were discussed and reported.