Fig. 1. Schematic of passively mode-locked ytterbium-doped fiber laser

Fig. 2. Pulse temporal profile under different third-order dispersion

Fig. 3. Pulse temporal profile with the same absolute value of third-order dispersion

Fig. 4. Pulse frequency spectrum under different third-order dispersion

Fig. 5. Position and intensity of pulse sidebands vary with third-order dispersion

Fig. 6. Influence of third-order dispersion on pulse shift

Fig. 7. Variation of pulse width time with fourth-order dispersion

Fig. 8. Pulse evolution diagram and pulse spectrum while ${\beta }_4=-20{\text{ps}}^4\text{km}$

Fig. 9. Variation of sideband intensity with fourth-order dispersion