Fig. 1. Schematic of oscillator-amplifier integration of all-fiber laser system

Fig. 2. Oscillator-amplifier analytical model

Fig. 3. Steady power distribution of oscillator-amplifier integration of all-fiber laser system

Fig. 4. Laser output power versus pump power

Fig. 5. M2 versus output power

Fig. 6. Spectra of the fiber laser with output power of 2031 W

Fig. 7. Stability of output power