'Er POT.3+' and 'Er POT.3+'/'Yb POT.3+'-Doped Si'O IND.2'-'Ta IND.2''O IND.5' planar waveguides for amplification around 1550 nm - Lima, K. O.; Ferrari, J. L.; Gonçalves, Rogéria Rocha (Brazilian Meeting on Inorganic Chemistry, 2010)