Iparraguirre I, Azkargorta J, Balda R, Venkata Krishnaiah K, Jayasankar C K, Al-Saleh M, Fernández J
Departamento de Fisica Aplicada I, Escuela Superior de Ingenieria, Universidad del Pais Vasco UPV/EHU, Alda. Urquijo s/n 48013 Bilbao, Spain.
Opt Express. 2011 Sep 26;19(20):19440-53. doi: 10.1364/OE.19.019440.
The influence of the host matrix on the spectroscopic and laser properties of Nd(3+) in a K-Ba-Al phosphate glass has been investigated as a function of rare-earth concentration. Site-selective time resolved laser spectroscopy and stimulated emission experiments under selective wavelength laser pumping show the existence of a very complex crystal field site distribution of Nd(3+) ions in this glass. The peak of the broad stimulated (4)F(3/2)→(4)I(11/2) emission shifts in a non monotonous way up to 3 nm as a function of the excitation wavelength. This behavior can be explained by the relatively moderate inter-site energy transfer among Nd(3+) ions found in this system and measured by using fluorescence line narrowing spectroscopy. The best slope efficiency obtained for the laser emission was 40%.
研究了基质对K-Ba-Al磷酸盐玻璃中Nd(3+)光谱和激光性能的影响，并将其作为稀土浓度的函数进行研究。在选择性波长激光泵浦下进行的位点选择性时间分辨激光光谱和受激发射实验表明，该玻璃中Nd(3+)离子存在非常复杂的晶体场位点分布。随着激发波长的变化，宽的受激发射(4)F(3/2)→(4)I(11/2)发射峰以非单调方式移动高达3 nm。这种行为可以通过该系统中Nd(3+)离子之间相对适度的位点间能量转移来解释，并用荧光线窄化光谱进行测量。激光发射获得的最佳斜率效率为40%。
