Mixed Former Effect: A Kind of Composition Adjusting Method ofEr-Doped Glass for Broadband Amplification

Abstract

A compositional adjusting method called the mixed former effect isproposed to improve effectively optical properties such as the emissioncross section, the fluorescence full width at half maximum (FWHM) and the lifetimeof the 4I13/2 level of Er-doped glass. A kind of Er-dopedbismuth-based glass illustrated high emission cross section(σep = 0.66-0.90 pm2), large fluorescenceFWHM (68-85 nm), and relatively long lifetime of the4I13/2 level (τm = 1.6-4.3 ms) using this method.A comparison of spectroscopic parameters shows that bismuth-based glass ismuch better for broadband amplifiers than other glass hosts.