We report on the integration of erbium doped silicon-rich oxide into
toroidal microcavities. Coupling of erbium ions to microtorus whispering
gallery modes is evidenced at room temperature under excitation of silicon
clusters. The fabrication process is controlled so that no luminescence
quenching occurs during the silica melting step. The spatial and spectral
distributions of outgoing light are investigated thanks to independent
excitation and collection optics.