<p>Er³⁺ and Nd³⁺ doped cadmium aluminium fluoro lead borate glasses were fabricated by using conventional melt-quenching method, with varying doping concentrations of Er³⁺, Nd³⁺ rare-earth ions. These prepared glasses were then characterized to study their structural and optical properties. Non-crystalline nature of the prepared glasses was confirmed by XRD characterization, while EDAX analysis has confirmed the presence of all elements in the prepared glasses. Functional groups were identified by using FTIR spectral analysis. Optical properties of glass samples were studied systematically. Optical band gaps and Urbach energy values were determined for both Er³⁺ and Nd³⁺: CdPbBAlF glasses by employing absorption spectra. The emission spectra of prepared glasses were analysed by an excitation source having a wavelength (λ_exci.) of 514.5&#xa0;nm. The Er³⁺ emission spectra depict characteristic peaks transitioned at ⁴I_13/2 → ⁴I_15/2 and for Nd³⁺ ions doped glasses the transition is at ⁴F_3/2 → ⁴I_11/2. Their energy transition schemes were also explained along with effect of concentration quenching. This demonstrates that glasses exhibit intense emission and absorption bands at 1.5&#xa0;mol% of Er³⁺ and Nd³⁺ ions and can be used in the various applications in optical communication and IR laser applications.</p>