With interest in the luminescence properties, dysprosium doped six series of zinc phosphate glass composition with different concentrations (0.1, 0.3, 0.5, 1.0, 1.5 and 2.0 mol%) were prepared by melt quenching method, and their luminescence has been investigated. Structural properties were accomplished from XRD (X-Ray Diffractometer) and Raman spectrum. Spectroscopic properties were investigated by measuring optical absorption spectrum, excitation spectrum, emission spectra and decay profiles. Dysprosium environment in zinc phosphate host glass matrix can be accessed by Judd-Ofelt (J-O) theoretical approach. This theory gives three important parameters such as Ω2, Ω4 and Ω6 parameters. In turn these parameters were further used to calculate emission properties of Dy3+ ions. Luminescence parameters such as effective bandwidth (Δλeff), stimulated emission crosssections (σp) and branching ratios (βexp) have been studied through photoluminescence spectra. By adjusting the doping concentration in glass system, the concentration quenching phenomenons occur. The photoluminescence spectra exhibit three prominent transitions. Of which, the yellow transition has high emission intensity. Further, decay time constants have been estimated from the decay profiles of Dy3+ doped different zinc phosphate glasses. This approach shows the present prepared zinc phosphate glasses significant for yellow lasing action.
