Xu Tiefeng, Zhang Xudong, Li Guangpo, Dai Shixun, Nie Qiuhua, Shen Xiang, Zhang Xianghua
Faculty of Information Science and Engineering, The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Ningbo University, Zhejiang 315211, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2007 Jun;67(2):559-63. doi: 10.1016/j.saa.2006.08.015. Epub 2006 Aug 18.
A series of novel 70TeO2-(15-x)B2O3-xNb2O5-15ZnO-1wt.% Er2O3 (TBN x=0, 3, 6, 9, 12 and 15 mol%) tellurite glasses were prepared. The thermal stability, absorption spectra, emission spectra, and the lifetime of the (4)I(13/2) level of Er(3+) ions were measured and investigated. Three Judd-Ofelt intensity parameters Omega(t) (t=2, 4 and 6) (Omega(2)=(5.42-6.76)x10(-20)cm(2); Omega(4)=(1.37-1.73)x10(-20)cm(2); Omega(6)=(0.70-0.94)x10(-20)cm(2)) of Er(3+) ions were calculated by Judd-Ofelt theory. It is found that the Omega(6) first increases with the increase of Nb2O5 content from 0 to 6 mol% and then decreases, which is mainly affected by the number of non-bridging oxygen ions of the glass network. The high peak of stimulated emission cross-section (sigma(e)(peak)=(0.77-0.91)x10(-20)cm(2)) of Er(3+): (4)I(13/2)-->(4)I(15/2) transition were obtained according to McCumber theory and broad full width at half maximum (FWHM=65-73 nm) of the (4)I(13/2)-->(4)I(15/2) transition of Er(3+) ions were measured. The results indicate that these new TBN glasses can be used as a candidate host material for potential broadband optical amplifiers.
制备了一系列新型70TeO2-(15-x)B2O3-xNb2O5-15ZnO-1wt.% Er2O3（TBN，x = 0、3、6、9、12和15摩尔%）碲酸盐玻璃。测量并研究了其热稳定性、吸收光谱、发射光谱以及Er3+离子(4)I(13/2)能级的寿命。根据Judd-Ofelt理论计算了Er3+离子的三个Judd-Ofelt强度参数Ωt（t = 2、4和6）（Ω2 = (5.42 - 6.76)×10-20cm2；Ω4 = (1.37 - 1.73)×10-20cm2；Ω6 = (0.70 - 0.94)×10-20cm2）。发现Ω6首先随着Nb2O5含量从0增加到6摩尔%而增加，然后下降，这主要受玻璃网络中非桥氧离子数量的影响。根据McCumber理论获得了Er3+：(4)I(13/2)→(4)I(15/2)跃迁的受激发射截面高峰值（σe(peak) = (0.77 - 0.91)×10-20cm2），并测量了Er3+离子(4)I(13/2)→(4)I(15/2)跃迁的半高宽（FWHM = 65 - 73 nm）。结果表明，这些新型TBN玻璃可作为潜在宽带光放大器的候选基质材料。
