EMISSION PROPERTIES OF Er~(3+)-DOPED TeO_2-WO_3-ZnO GLASSES

Erbium ion-doped TeO_(2)WO_(3)ZnO (TWZ) glasses with different compositions and doping content were prepared by traditional meltingquenching method. The absorption spectra, 1.5 μm emission spectra and fluorescence lifetimes of Er~(3+), excited at 970 nm, were measured. For the samples of Er_(2)O_(3)-doping in molar fraction of 0.6% and at the peak value of 1.5 μm, the absorption cross-section measured from absorption spectra, and the stimulated emission cross-section, through calculating , are 0.74~( )— 0.77 pm~(2) and 0.86—0.90 pm~(2) respectively, and changed only a little with glass compositions. Er~(3+) ions have a larger full width at half maximum(FWHM) of fluorescence emission at 1.5 μm in the 75TeO_(2)20WO_(3)5ZnO glass of molar composition. With the increasing of Er~(3+)-doping concentration, the fluorescence intensities and FWHM of Er~(3+) at 1.5 μm increase wholly. The obtained FWHM is 80 nm when the Er~(3+) content is 3.34×10~(20 )/cm~(3). Er~(3+) ions also have good solubility and relatively weak concentration quenching effect in TWZ glasses.