Spectral investigations of Sm3+ doped lead bismuth magnesium borophosphate glasses

The multicomponent lead bismuth magnesium borophosphate glass systems (LBMBPS) doped with Samarium ions with the molar compositions of (50−x)PbOxBi2O325MgHPO424B2O31Sm2O3 (where x=10, 20, 30, and 40) were fabricated using conventional melt quenching technique. The amorphous nature of these glass samples was confirmed with XRD studies. The spectral data from the optical absorption studies were employed to compute various spectroscopic parameters such as Judd–Ofelt intensity parameters. The Judd–Ofelt parameterization employed reflects the covalency and vibration frequencies of the ligands with Samarium ions. The radiative parameters such as radiative transition probabilities (A), the total radiative transitional probabilities (AT), radiative life times (τR), branching ratios (β) and absorption cross sections (Σ) were computed for certain lasing levels. The glass systems thus developed indicate their potential lasing candidature. The emission cross sections (σE) for the significant lasing transitions 4G5/2→6H5/2, 4G5/2→6H7/2, and 4G5/2→6H9/2 evaluated from the photoluminescence spectra were reported. The radiative properties obtained in our investigations suggest their lasing candidature. ► Value of Ω2 highest for LBMBPS1 glass. ► Intensity of transition 4G5/2→6H9/2>4G5/2→6H5/2 indicates asymmetric nature of the host. ► Value of βR of emission 4G5/2→6H7/2 is 65% indicating its lasing potentiality.