Optical absorption and fluorescence studies of Dy~3-doped lead telluroborate glasses

摘要

Lead telluroborate (PTBDy) glasses doped with different Dy~3 ion concentrations were prepared by melt quenching technique and investigated through optical absorption, fluorescence and decay measurements. The JuddOfelt intensity parameters (_λ) are obtained by a least square fit analysis. The small root mean square deviation of ±0.34×10~(-6) shows a good fit between the experimental and calculated oscillator strengths. The radiative properties of the ~4F_(9/2)→~6H(13/2) emission transition of PTBDy10 glass are determined and compared to the other reported glasses. The variation of decay time of the ~4F_(9/2) emission state is attributed to the interaction among the excited Dy~3 ions at higher concentration. The PTBDy10 glass is found to be a suitable candidate for solid state laser materials to produce intense yellow (576 nm) luminescence through the ~4F_(9/2)→~6H(13/2) transition.