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Erbium-doped glasses showing a wide 1.55?m emission band are reported ina novel heavy metal oxyfluoride glass system SiO2-PbO-PbF2 and their optical properties such as emission spectra,fluorescence lifetime and the refractive index have been investigated.The broad and flat 4I13/2 →4I15/2 emission of Er3+ ions around 1.55μm can be used as host materials for potential optical amplifiers in wavelength-division-multiplexing network system.We find that with increasing PbF2 content in the glass composition,the fluorescence full width at half maximum and fluorescence lifetime of the 4I13/2 level of Er3+ increase,while refractive index and density decrease.