Fig. 1. Experimental setup of the mode-locked fiber laser

Fig. 2. The transmission characteristic of NALM for different ϕ values

Fig. 3. The output characteristics of mode-locked fiber laser

Fig. 4. Wavelength tuning characteristics under pump power of 240 mW

Fig. 5. Spectra of mode-locked in different pump powers

Fig. 6. Spectra and pulse duration in different mode-locked state

Fig. 7. Output power versus pump power