<p>The comprehensive analysis of optical, structural, and electrical properties of lithium aluminum borate glasses doped with Tb₂O₃ was carried out. Using the melt quenching method, glass samples were fabricated with varying Tb₂O₃ concentrations. Through XRD characterization, the produced glasses’ non-crystalline nature was verified. FTIR spectra analysis was used to identify functional groups. The optical band gaps were evaluated using absorption spectra, and the values vary from 3.37 to 3.033&#xa0;eV. As Tb₂O₃ increased, the glass transition temperature declined, but the thermal stability parameter (ΔT) improved, according to differential thermal analysis. Dielectric properties were analyzed across a broad frequency range and at temperatures from 30 to 110°C using an impedance analyzer. Dielectric studies show the increased dielectric constant and loss with higher temperatures and also with Tb₂O₃ concentrations. The complex modulus analysis indicates a relaxation process and a transition from long-range to short-range ion mobility with increasing frequency. Our findings reveal that the addition of Tb₂O₃ decreases impedance values and increases AC conductivity. The results indicated that terbium-doped lithium aluminum borate glasses exhibit enhanced conductivity and dielectric properties, suggesting their suitability for advanced optoelectronic devices. The temperature-dependent activation energy increases with higher Tb₂O₃ content, further supporting their potential for high-performance photonic devices.</p>