%0 Journal Article
%T Influence of PbX<sub>2</sub> (X = F, Cl, Br) content and thermal treatment on structure and optical properties of lead borate glasses doped with rare earth ions
%A Joanna Pisarska
%A Radoslaw Lisiecki
%A Grazyna Dominiak-Dzik
%A Witold Ryba-Romanowski
%J Optica Applicata
%D 2010
%I 
%X Oxyhalide lead borate glasses doped with rare earth ions have been studied before and after thermal treatment. The rare earths as optically active ions were limited to the Er3+ ions. Near-infrared luminescence due to the main 4I13/2¨C4I15/2 laser transition of Er3+ was registered. The introduction of PbX2 to the borate glass results in a reduction of spectral linewidth and an increase of luminescence lifetime of 4I13/2 state of Er3+ ions. The unusual large spectral linewidth for 4I13/2¨C4I15/2 transition of Er3+ in the oxide glass host was obtained, whereas the luminescence decay from 4I13/2 state is longer for a sample with PbF2 than PbCl2 and PbBr2. Heat treatment introduces transformation from a glass to transparent glass-ceramic (TGC). The coordination sphere around Er3+ ions is changed, giving important contribution to the luminescence characteristics. The spectroscopic consequence of this transformation is the increase of luminescence lifetime and the narrowing of spectral lines of Er3+.
%K lead borate glasses
%K rare earth ions
%K thermal treatment
%K luminescence
%K up-conversion
%U http://www.if.pwr.wroc.pl/~optappl/pdf/2010/no2/optappl_4002p351.pdf