Spectral investigations of Sm ~(3+) doped lead bismuth magnesium borophosphate glasses

摘要

The multicomponent lead bismuth magnesium borophosphate glass systems (LBMBPS) doped with Samarium ions with the molar compositions of (50-x)PbO-xBi _2O _3-25MgHPO _4-24B _2O _3-1Sm _2O _3 (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 (A _T), radiative life times (τ _R), 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 (σ _E) for the significant lasing transitions ~4G _(5/2)→ ~6H _(5/2), ~4G _(5/2)→ ~6H _(7/2), and ~4G _(5/2)→ ~6H _(9/2) evaluated from the photoluminescence spectra were reported. The radiative properties obtained in our investigations suggest their lasing candidature.