Characterization of Er3+ doped Tellurite glasses used in Long Optical Communication

Er3+ doped tellurite glasses are promising candidates for potential broadband optical amplifier and tunable fiber lasers because of their excellent optical properties. The emission spectrum show that their FWHM around 1.5 mu m is about 50nm which is almost twice as broad as the corresponding spectrum in silica. The lifetime of the I-4(13/2) metastable state is long enough to make these glasses suitable to be used in optical amplification devices. For the great transmission capacity and efficiency, optical fiber based on Er3+ doped tellurite glasses will widely used in the very long optical communication trunks.