Enhancement of 2.0 μm fluorescence emission in new Ho3+/Tm3+/Yb3+ tri-doped tellurite glasses

The effect of MnCO3 on the gain coefficient for the 4I13/2 → 4I15/2 transition of Er3+ ions and near-infrared emission bandwidth flatness of Er3+/Tm3+/Yb3+ co-doped barium zinc silicate glasses

“…9,10 Therefore, for the NIR emission spectra of Tm 3+ -doped and Er 3+ /Tm 3+ -co-doped glasses using a commercial wavelength 980 nm LD for excitation, Yb 3+ ions are oen introduced as a sensitizer or for a cooperative energy transfer (CET) process through dimers/ trimers such as a Yb 3+ -Yb 3+ dimer, 11 Cr 3+ -Yb 3+ dimer, 12 Mn 2+ -Yb 3+ dimer, 13,14 or Mn 2+ -Mn 2+ -Yb 3+ trimer 4,15 for direct excitation by the commercial wavelength of a 980 nm LD. 16 Among the dimers, the Mn 2+ -Yb 3+ dimer formed by transition metal ions Mn 2+ and Yb 3+ ions is commonly used for the CET process of NIR emission spectra of Tm 3+ doped or Er 3+ /Tm 3+ co-doped in host glasses. 13,14,17 In addition to expanding the NIR spectral bandwidth for REIs, recent studies have also focused on investigating and nding solutions to atten the NIR spectral bandwidth of these REIs to optimize the obtained NIR spectral bandwidth for optical applications.…”