ABSTRACT MgONPs were synthesized by pulsed (Q-switched, 1064-Nd: YAG, E=100mJ) laser ablation of Mg metal plates immersed in SDS solution with concentration (0.01)M and analysis by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM)techniques. Absorbance and Fluorescence spectra of the produced nanoparticles solution was measured by uv-vis and Fluorescence spectrophotometer.