Enhanced bandwidth of MIR emission from Yb3+/Er3+/Dy3+ triply doped low phonon oxide glass system has been reported in this work. With considerable gain cross-section, the MIR emission bandwidth can be stretched from similar to 2600 to 3100 nm (similar to 500 nm) which is practically not possible to obtain from Er3+ or Dy3+ ions singly doped systems. Co-doping of Dy3+ ions not only quenches the unfavourable visible up-converted emissions from Er3+ ions but also mitigates the prominent similar to 1.5 mu m emission. A broad MIR emission on superimposition of Er3+ similar to 2.76 mu m and Dy3+ similar to 2.95 mu m emissions was obtained owing to the efficient energy transfer (ET) Yb3+ -> Er3+ -> Dy3+ upon similar to 980 nm excitation. The present glasses can be fiberized to develop compact and tunable MIR solid state fiber laser sources
