Photoluminescence spectrum of rare earth doped zirconia fiber and power excitation dependence - De Vicente, Fábio Simões; Hernandes, Antônio Carlos; Castro, A. C.; Souza, Milton Ferreira de; Andreeta, Marcelo Rubens Barsi; Siu Li, Máximo (Europhysical Conference on Defects in Insulating Materials, 1998)