Kir'yanov Alexander V, Dvoyrin Vladislav V, Mashinsky Valery M, Il'ichev Nikolai N, Kozlova Nina S, Dianov Evgueny M
Centro de Investigaciones en Optica, Leon, Mexico.
Opt Express. 2011 Mar 28;19(7):6599-608. doi: 10.1364/OE.19.006599.
We report a study of the attenuation spectra transformations for a series of Bismuth (Bi) doped silica fibers with various contents of emission-active Bi centers, which arise as the result of irradiation by a beam of high-energy electrons. The experimental data reveal a substantial decrease of concentration of the Bi centers, associated with the presence of Germanium in silica glass, at increasing the irradiation dose (the resonant-absorption bleaching effect in germano-silicate fiber). In contrast, the spectral changes that appear in Bi doped alumino-silicate fiber have through irradiation a completely different character, viz., weak growth of the resonant-absorption peaks ascribed to the Bi centers, associated with the presence of Aluminum in silica glass. These results demonstrating high susceptibility of Bi centers to electron irradiation while opposite routes of the irradiation-induced spectral changes in Bi doped germanate and aluminate fibers seem to be of worth notice for understanding the nature of these centers.
我们报告了一项关于一系列具有不同发射活性铋中心含量的铋（Bi）掺杂石英光纤的衰减光谱变换的研究，这些变换是由高能电子束辐照产生的。实验数据表明，随着辐照剂量增加，与石英玻璃中锗的存在相关的铋中心浓度大幅降低（锗酸盐光纤中的共振吸收漂白效应）。相比之下，铋掺杂铝硅酸盐光纤中出现的光谱变化在辐照后具有完全不同的特征，即归因于铋中心的共振吸收峰微弱增长，这与石英玻璃中铝的存在有关。这些结果表明铋中心对电子辐照高度敏感，而铋掺杂锗酸盐和铝酸盐光纤中辐照诱导光谱变化的相反路径对于理解这些中心的性质似乎值得关注。
