Er3+-Pr3+-Yb3+ Tri-doped La2O3-Al2O3-SiO2 Glass Double Clad Fiber for C+L Amplification

Er ³⁺ -Pr ³⁺ -Yb ³⁺ tri-doped double clad fiber was fabricated by the stack-and-draw technology. The fiber core Er ³⁺ -Pr ³⁺ -Yb ³⁺ tri-doped La2O3-Al2O3-SiO2 glass was prepared using the conventional melting method. The fluorescence properties of fiber were experimentally investigated. The result suggested Er ³⁺ -Pr ³⁺ -Yb ³⁺ tri-doped double clad fibers are potential material for broadband light source and C+L amplification.