Fig. 1. Schematic of passively mode-locked fiber laser with different pumping schemes

Fig. 2. Evolution and output of pulses in the ANDi laser cavity with fixed gain saturation energy and gain bandwidth. (a) Result of pulse evolution in a stable cycle; (b) temporal profile with different pumping schemes; (c) variation of pulse peak power in the cavity with different pumping schemes; (d) variation of pulse duration in the cavity with different pumping schemes

Fig. 3. Influence of gain saturation energy on parabolic pulses in ANDi fiber lasers with different pumping schemes. (a) Misfit; (b) pulse duration; (c) spectrum width; (d) pulse energy

Fig. 4. Influence of gain bandwidth on parabolic pulses in ANDi fiber lasers with different pumping schemes. (a) Misfit; (b) pulse duration; (c) spectrum width; (d) pulse energy