Fig. 1. Structural diagram of Mach-zehnder interferometer fiber filter

Fig. 2. Structural diagram of MKR

Fig. 3. Structural diagram of hybrid laser based on MZI

Fig. 4. Multi-wavelength continuous laser with adjustable central wavelength

Fig. 5. Single wavelength mode-locked laser. (a) Optical spectrum; (b) oscilloscope pulse train; (c) frequency spectrum; (d) pulse autocorrelation curve

Fig. 6. Dual-wavelength mode-locked laser. (a) Optical spectrum; (b) oscilloscope pulse train; (c) frequency spectrum; (d) pulse autocorrelation curve

Fig. 7. Multi-wavelength mode-locked laser

Fig. 8. Structural diagram of laser based on MKR

Fig. 9. Multipulse bound state solitons. (a) Optical spectrum; (b) oscilloscope pulse train; (c) frequency spectrum; (d) pulse autocorrelation curve

Fig. 10. Soliton mode-locked laser. (a) Optical spectrum; (b) oscilloscope pulse train; (c) frequency spectrum; (d) pulse autocorrelation curve

Fig. 11. Harmonic mode-locked laser. (a1)－(a3) Optical spectrum; (b1)－(b3) oscilloscope pulse train; (c1)～(c3) frequency spectrum

Fig. 12. Simulated soliton pulse. (a) Optical spectrum; (b) time domain diagram

Fig. 13. Pulse sequences under different FSRs. (a1)－(a3) Optical spectrum; (b1)－(b3) time domain diagram