YI Yongqing, NING Ding, JING Guangming, et al. The optimum design and fabrication of Yb3+-doped double-clad optical fibers[J]. 2003,(6):46-49. DOI: 10.13756/j.gtxyj.2003.06.013.
The article gave an introduction to the optimun design
principle and fabrication technology of the Yb3+doped doubleclad fiber which is made by MCVD and solution doping technique. This Yb3+doped donbleclad fiber has high doping concentration (the absorption loss is 2~10 dB/m at 976 nm) and low intrinsic loss (10 dB/km at 1.3μm).