Comparative study of the spectroscopic properties of Yb3/Er 3 codoped tellurite glasses modified with R2O (R=Li, Na and K)

1. Desirena, H.
2. De La Rosa, E.
3. Romero, V.H.
4. Castillo, J.F.
5. Díaz-Torres, L.A.
6. Oliva, J.R.