Erbium and ytterbium doped phosphotellurite glasses for lasers and optical amplifiers

Abstract

The luminescence from rare earth ions offer ample prospect for fabrication of laser and amplifier Erbium Er doped tellurite glasses provide broad C L band 1535 1610nm amplification suitable for wavelength division multiplexed WDM optical communication networks Tellurite glasses are important because of their high emission cross section higher gain bandwidth wide range of transparency and higher nonlinear refractive index comparing to many other glasses However tellurite based glasses