Fig. 1. Experimental structure diagram of dual-wavelength mode-locked fiber laser

Fig. 2. Output characteristics of single-wavelength mode-locked laser. (a) Spectral diagram of single-wavelength mode-locked laser; (b) radio-frequency spectrum; (c) time-domain diagram of 400 ns oscilloscope; (d) autocorrelation curve. Inset is radio-frequency spectrum in 550 MHz range

Fig. 3. Output characteristics of asynchronous dual-wavelength mode-locked laser. (a) Asynchronous dual-wavelength spectrogram; (b) radio-frequency spectrum; (c) 1 h spectral change; (d) power fluctuation in 1 h

Fig. 4. Oscilloscope pulse sequences in each time period. (a) Oscilloscope 40 ms range pulse sequence interferogram; (b)-(e) oscilloscope 400 ns range trace diagram

Fig. 5. Output characteristics of synchronous dual-wavelength mode-locked laser. (a) Synchronous dual-wavelength spectrogram; (b) radio-frequency spectrum; (c) oscilloscope 100 ms range trace diagram; (d) oscilloscope 400 ns range trace diagram

Fig. 6. Filtering experimental diagram. (a) Filtering spectrogram; (b) filtering radio-frequency spectrogram; (c) filtering oscillograph

Fig. 7. Experimental diagram of synchronous dual-wavelength stabilityity. (a) Spectral change in 1 h during synchronous dual-wavelength mode-locking; (b) power fluctuation in 1 h