The growing interest for the use of integrated optical(IO) amplifiers in optical fiber telecom has led to deep search for ever better rare-earth-doped glassy materials. Some properties of a set of Er~(3+)/Yb~(3+)-doped silicate glasses are reported. Planar and channel waveguides are fabricated by Ag~+-Na~+ ion exchange. Spectral measurement shows that the fluorescence emission peak for all the samples is observed at 1532 nm, with a full-width at half-maximum equal to(19 nm.) Measurements of the lifetime of the metastable state(()~4I_(13/2)) of Er~(3+) are performed upon excitation by laser pumps at 514.5 nm and 980 nm, and life time of the order of 7 ms are measured in most samples. The intensity of the up-conversion fluorescence is less in Er~(3+)/Yb~(3+) co-doped glasses than in Er~(3+)-doped ones. 5 dB net gain at the wavelength of 1536 nm has been obtained in a 3.5 cm long channel waveguide with(250 mW) pump power at 980 nm and the FWHM is 14 nm.