Department of Physics, Sri Venkateswara University, Tirupati-517 502, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2010 Sep 15;77(1):135-40. doi: 10.1016/j.saa.2010.04.040. Epub 2010 May 6.
Neodymium doped zinc-tellurite glasses of composition TeO(2)-ZnO-Na(2)O-Li(2)O have been prepared and characterized for their thermal, structural and optical properties. Differential thermal analysis revealed reasonably good forming tendency of the glass composition. FTIR spectra were used to analyze the functional groups present in the glass. Judd-Ofelt intensity parameters were derived from the absorption spectrum and used to calculate the radiative lifetime, branching ratio and stimulated emission cross-section for (4)F(3/2)-->(4)I(9/2, 11/2, 13/2) transitions. The quantum efficiency of the (4)F(3/2) level is comparable to the typical values obtained for the Nd(2)O(3)-doped glasses. The decay properties for higher concentration of Nd(2)O(3) were analyzed using Inokuti-Hirayama model to investigate the non-radiative relaxation of the (4)F(3/2) emitting level. The experimental values of branching ratio and saturation intensity of (4)F(3/2)-->(4)I(11/2) transition and calculated spectroscopic quality factor indicate the favourable lasing action in these glasses.
掺钕锌碲酸盐玻璃的组成 TeO(2)-ZnO-Na(2)O-Li(2)O 已被制备并对其热、结构和光学性能进行了表征。差热分析表明该玻璃组成具有较好的成型趋势。傅里叶变换红外光谱用于分析玻璃中存在的官能团。从吸收光谱中得出了 Judd-Ofelt 强度参数，并用于计算 (4)F(3/2)-->(4)I(9/2,11/2,13/2)跃迁的辐射寿命、分支比和受激发射截面。(4)F(3/2)能级的量子效率与 Nd(2)O(3)掺杂玻璃获得的典型值相当。通过 Inokuti-Hirayama 模型分析较高浓度 Nd(2)O(3)的衰减特性，研究 (4)F(3/2)发射能级的非辐射弛豫。(4)F(3/2)-->(4)I(11/2)跃迁的分支比和饱和强度以及计算的光谱品质因子的实验值表明这些玻璃具有有利的激光作用。
