Numerical Simulation of 980 nm-LD-Pumped Yb³⁺-Er³⁺-Tm³⁺-Codoped Fiber Amplifier for 1500 nm and 1600 nm Bands

Figure 1

The schematic of energy level and transition configuration and energy transfer process of Yb³⁺, Er³⁺ and Tm³⁺ codoped telluride fiber system pumped with 980 nm LD.