Cooperative luminescence and absorption in Ytterbium-doped silica fiber and the fiber nonlinear transmission coefficient at lambda=980 nm with a regard to the Ytterbium ion-pairs' effect: Comment.
Recently, significant power losses in ytterbium-doped fibers have been interpreted as resulting from the formation of ytterbium ion pairs [A. V. Kir'yanov et al., Opt. Express 14, 3981 (2006)]. However, there appears to be strong evidence against this model.
Paschotta
Rüdiger
R
Tropper
Anne C
AC