Near-infrared and upconversion properties of neodymium-doped 'Re IND.0,8''La IND.0,2'V'O IND.4' (Re=Y,Gd) single-crystal fibres grown by the laser-heated pedestal growth technique - de Camargo, Andrea Simone Stucchi; Nunes, Luiz Antônio de Oliveira; Andreeta, Marcello Rubens Barsi; Hernandes, Antônio Carlos (Journal of Physics, 2002)