The melt-quenching technique was used to create lanthanum borate glass doping with Tb³⁺ (LBTb) to investigate physical and luminescent characteristics. The consequence is that the doped terbium with greater concentration increases the glass denseness, molar volume and refractive index. With higher Tb₂O₃ concentrations, the glass absorbs more photons in the visible and near-infrared ranges. The emission spectra of glasses were recorded at excitation wavelengths of 228 and 377 nm, and it was discovered that these glasses emit vivid green light. Tb³⁺ doped glass exhibited a strength emitted at a wavelength of 544 nm. The optimal concentration of terbium with the most significant emission in LB is 7 mol%, whereas decay time decreases as Tb₂O₃ content increases. The PL measurement accord with the spectrum of RL emissions. According to the CIE 1931 chromaticity research, the light emitted by terbium doping glass has a yellowish-green color. Terbium-doped glasses have attractive potential to be used in yellowish-green lasers in the future.