Influence of High Phonon Energy Oxide on Spectroscopic Properties of Er~(3+)/Ce~(3+) Co-doped Tellurite Glasses

High phonon energy oxides of WO3,SiO2and B2O3were introduced into the Er3+/Ce3+co-doped tellurite glass(TeO2-Bi2O3-TiO2) with low phonon energy,respectively.The absorption spectra in the wavelength region of 400–1700 nm,fluorescence spectra of 1.53 μm band,fluorescence lifetimes of Er3+ and Raman spectra of the glasses were measured.The spectral parameters of Er3+ were calculated with the help of McCumber theory.It is shown that the energy transfer process between Er3+ and Ce3+ becomes more effectively when introducing the high phonon energy oxide,and the 1.53 μm band fluorescence emission corresponding to Er3+:4I13/2→4I15/2 transition enhances accordingly due to the increased population of Er3+ in the 4I13/2 level.Meanwhile,the fluorescence width at half magnitude(FWHM) and bandwidth quality factor(σe×FWHM) can be improved with the introducing of high phonon energy oxide.The results provide practical significance to obtain the excellent spectroscopic glass host applied for the Er3+-doped fiber amplifier(EDFA).