Fig. 1. Setup of the fiber laser and the measurement system.

Fig. 2. (a) Typical oscilloscope trace; (b) corresponding stretched pulses captured by DFT; (c) single-shot spectrum, average spectrum calculated from 100 single-shot spectra, and spectrum recorded by OSA.

Fig. 3. (a) Spectral evolution of both pulses; (b) temporal behavior during the evolution process; (c) changing of the energy and spectral width of both pulses.

Fig. 4. (a) Spectral evolution of both pulses; (b) temporal behavior during the evolution process; (c) changing of the energy and spectral width of both pulses; (d) the zoom-in waterfall plot of the spectral pattern extracted from the dataset in (a).

Fig. 5. Spectral evolution of the bound state at the decline rate of pump power of (a) ∼1.09  μW/round-trip and (b) ∼11.32  μW/round-trip. Inset of (a): decaying dynamics of the bound state mapped in the interaction plane.