Sm2O3–SrO–B2O3 glasses containing ascending ratios of ZnO were created via the standard melt quenching
approach. The optical and luminescent properties were assessed by analysing absorption, reflectance, excitation,
and emission spectra obtained from measurements. The density, molar volume, metallization criterion, optical
basicity, optical bandgap, Urbach energy, and dispersion parameters were evaluated and discussed. The spectral
radiative transitions of the Sm3+ ion in different excited states were investigated using the Judd–Ofelt (J–O)
theorem. The least square fit method was used to evaluate the J–O intensity parameters, which were subsequently
utilized to determine radiative characteristics including transition probability, branching ratio, and
lifetime. For all glasses, the reddish orange transition 4G5/2 → 6H7/2 demonstrated the highest strength and had
the maximum values for stimulated emission cross section, radiative transition probability, and gain bandwidth.
The chromaticity coordinates fell within the reddish orange region and the colour correlated temperatures
ranged from 1840 to 1935 K, suggesting the suitability of the glasses for warm reddish orange emission-based
laser and photonic applications.