The Bi ion doped 80GeO2-10Nb2O5-10X(X=Li2O,Na2O,CaO) glasses with 1 molar percent concentration were prepared by conventional melting method.The DTA curves,absorption spectra,fluorescence lifetime and Fourier transform infrared(FTIR) spectra were measured.The difference between glass crystallization onset temperature(Tx) and transition temperature(Tg) of the glasses is up to 200 ℃ from the DTA curves.It indicates that the glasses system has good thermal stability.Absorption peaks at 511 nm and 711 nm produced by the Bi ions are observed.The emission band at 1 300 nm with FWHM near 200 nm and fluorescence lifetime near 133 μs is observed under the excitation of 808 nm laser diode(LD).In the three-component glasses,the one with Li2O has the strongest near-infrared emission.The Bi3+ and Bi5+ ions co-exist in the glass from the FTIR.The near infrared broadband emission is probably from the emission of Bi5+.