Non-isothermal bleaching of Yb-Li co-doped silica fibers
In this work, non-isothermal bleaching of Yb-Li co-doped fiber was investigated. The Yb-Li co-doped fiber was beneficial to reduce the photodarkening (PD)-induced excess loss, and had no bad effect on the temperature of thermal bleaching (TB). Photodarkened fibers were bleached with different temperature ramp rates. The higher the ramp rate, the higher the complete bleaching temperature. The activation energy of the bleaching of Yb/Al/Li fiber was calculated by fitting, which was similar to that of Yb-doped fiber. It indicated that the mechanism of mitigating PD by Li co-doping was different from that of TB, and was not subject to temperature.
作者单位：National University of Denfence Technology
National University of Denfence Technology
Li Miao,Chen Gui,Leng Jinyong,Chen Jinbao,Li Jinyan. Non-isothermal bleaching of Yb-Li co-doped silica fibers[J].Chinese Optics Letters,2019,17(3):03.