Electron-Irradiation and Photo-Excitation Darkening and Bleaching of Yb Doped Silica Fibers: Comparison

• 作者: Alexander V. Kir’yanov
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 医学
• 关键词: YTTERBIUM DOPED Silica Fibers PHOTODARKENING Electron IRRADIATION
• 年，卷（期）: 2011,（4）
• 页码范围: 155-166
• 页数: 12页
• 分类号: R73

摘要

We report a comparative experimental study of the attenuation spectra transformations for a series of Yb doped alumino-germano silicate fibers with different contents of Yb3+ dopants, which arise as the result of irradiation either by a beam of high-energy electrons or by resonant (into the 977-nm absorption peak of YbYb3+ ions) optical pumping. The experimental data obtained reveal that in the two circumstances, substantial and complex but different in appearance changes occur within the resonant absorption band of YbYb3+ ions and in the off-resonance background loss of the fibers. Possible mechanisms responsible for these spectral changes are discussed.