Study of upconversion in highly Er-doped photonic crystal fibers through laser-transient dynamics

1. Martín, J.C.
2. Vallés, J.A.
3. Berdejo, V.
4. Rebolledo, M.A.
5. Díez, A.
6. Sánchez-Martín, J.A.
7. Andrés, M.V.