Zinc phosphate (ZP) glasses doped with different concentrations of europium (Eu3+) doped were prepared, and their luminescence spectra was investigated. Thermal properties were studied by differential thermal analysis (DTA) measurements. The phase composition of the product was verified by X-ray diffraction analysis. Structural properties were studied by FTIR and Raman spectrum. Optical transition properties of Eu3+ in the studied zinc phosphate glasses were evaluated in the framework of Judd - Ofelt theory. The radiative transition rates (AR), fluorescence branching ratios (__ampersandsignbeta;), stimulated emission cross-sections (__ampersandsignsigma;e) and lifetimes (__ampersandsigntau;exp) for certain transitions or levels were evaluated. Red emission of Eu3+ exhibits mainly by the 5D07F2 transition located at 612 nm. Concentration quenching was observed from fluorescence spectra. It is found to be that the lifetimes of 5D0 level increases with increase in concentration and then decreases. Intense orange-red light emission was obtained for the 2.0 mol% of Eu3+ ions in zinc phosphate glasses. This approach shows significant promise for use in reddish-orange lighting applications which is useful in photonics field.