Optical properties of Ho 3+-Yb 3+ co-doped nanostructured SiO 2-LaF 3 glass-ceramics prepared by sol-gel method

1. Velazquez, J.J.
2. Yanes, A.C.
3. Del Castillo, J.
4. Méndez-Ramos, J.
5. Rodríguez, V.D.