Zhang Xudong, Xu Tiefeng, Nie Qiuhua, Dai Shixun, 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 May;67(1):246-50. doi: 10.1016/j.saa.2006.07.008. Epub 2006 Jul 8.
Er(3+)/Yb(3+) co-doped 60Bi(2)O(3)-(40 - x)B(2)O(3)-xGeO(2) (BBG; x=0, 5, 10, 15 mol%) glasses that are suitable for fiber lasers, amplifiers have been fabricated and characterized. The absorption spectra, emission spectra, and lifetime of the (4)I(13/2) level and quantum efficiency of Er(3+):(4)I(13/2) --> (4)I(15/2) transition were measured and calculated. With the substitution of GeO(2) for B(2)O(3), both Delta lambda(eff) and sigma(e) decrease from 75 to 71 nm and 9.88 to 8.12 x 10(-21) cm(2), respectively. The measured lifetime of the (4)I(13/2) level and quantum efficiency of Er(3+):(4)I(13/2) --> (4)I(15/2) transition increase from 1.18 to 1.5 ms and 36.2% to 43.2%, respectively. The emission spectra of Er(3+):(4)I(13/2) --> (4)I(15/2) transition was also analyzed using a peak-fit routine, and an equivalent four-level system was proposed to estimate the stark splitting for the (4)I(15/2) and (4)I(13/2) levels of Er(3+) in the BBG glasses. The results indicate that the (4)I(13/2) --> (4)I(15/2) emission of Er(3+) can be exhibit a considerable broadening due to a significant enhance the peak A, and D emission.
已制备并表征了适用于光纤激光器、放大器的铒（3+）/镱（3+）共掺杂60Bi₂O₃ - （40 - x）B₂O₃ - xGeO₂（BBG；x = 0、5、10、15摩尔%）玻璃。测量并计算了（4）I₁₃/₂能级的吸收光谱、发射光谱和寿命以及铒（3+）：（4）I₁₃/₂→（4）I₁₅/₂跃迁的量子效率。随着用GeO₂替代B₂O₃，有效带宽Δλeff和发射截面σe分别从75 nm减小到71 nm以及从9.88×10⁻²¹ cm²减小到8.12×10⁻²¹ cm²。测量得到的（4）I₁₃/₂能级寿命和铒（3+）：（4）I₁₃/₂→（4）I₁₅/₂跃迁的量子效率分别从1.18 ms增加到1.5 ms以及从36.2%增加到43.2%。还使用峰拟合程序分析了铒（3+）：（4）I₁₃/₂→（4）I₁₅/₂跃迁的发射光谱，并提出了一个等效四能级系统来估计BBG玻璃中铒（3+）的（4）I₁₅/₂和（4）I₁₃/₂能级的斯塔克分裂。结果表明，由于显著增强了A峰和D峰发射，铒（3+）的（4）I₁₃/₂→（4）I₁₅/₂发射可呈现出相当大的展宽。
