Gao Yuan, Nie Qiu-Hua, Xu Tie-Feng, Shen Xiang
College of Information Science and Engineering, Ningbo University, Ningbo 315211, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2005 Oct;61(13-14):2822-6. doi: 10.1016/j.saa.2004.10.028. Epub 2004 Dec 9.
The Er3+/Yb3+-codoped 70TeO2-5Li2O-10B2O3-15GeO2 glass was prepared. The thermal stability, absorption spectra, emission spectra and up-conversion spectra were measured and investigated. The Judd-Ofelt analysis based on absorption spectra was performed in order to determine the Judd-Ofelt intensity parameters Omega(t) (t = 2, 4, 6), spontaneous emission probability, radiative lifetime and branching ratios of several Er3+ transitions. It was found that this studied glass has good thermal stability, broad fluorescence full width at half maximum (FWHM), large stimulated emission cross-section and strong up-conversion emissions at about 532, 546 and 659 nm, corresponding to the 2H(11/2)-->4I(15/2), 4S(3/2)-->4I(15/2) and 4F(9/2)-->4I(15/2) transitions of Er3+, respectively under the excitation at 970 nm. The results suggest that this Er3+/Yb3+-codoped germano-tellurite glass may be a potentially useful material for developing potential amplifiers and up-conversion optical devices.
制备了Er3+/Yb3+共掺杂的70TeO2-5Li2O-10B2O3-15GeO2玻璃。测量并研究了其热稳定性、吸收光谱、发射光谱和上转换光谱。基于吸收光谱进行了Judd-Ofelt分析，以确定Judd-Ofelt强度参数Ωt（t = 2、4、6）、自发发射概率、辐射寿命以及Er3+几个跃迁的分支比。结果发现，这种研究的玻璃具有良好的热稳定性、较宽的荧光半高宽（FWHM）、较大的受激发射截面以及在970 nm激发下分别对应于Er3+的2H(11/2)-->4I(15/2)、4S(3/2)-->4I(15/2)和4F(9/2)-->4I(15/2)跃迁在约532、546和659 nm处有较强的上转换发射。结果表明，这种Er3+/Yb3+共掺杂的锗碲酸盐玻璃可能是开发潜在放大器和上转换光学器件的一种潜在有用材料。
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