Fig. 1. Schematic setup. (a) The mode-locked fiber laser with NALM. (b) The TS-DFT detection system.

Fig. 2. Single-wavelength. (a) The spectrum of the DS in the logarithmic and linear scales. (b) The spectrum of NLP in the logarithmic and linear scales.

Fig. 3. DS and NLP characteristics. (a) DS to NLP shot-to-shot spectra. (b) RF spectrum and autocorrelation trace of the DS. (c), (d) RF spectrum and autocorrelation trace of the NLP. (e) NLP to DS shot-to-shot spectra. (f)–(h) Close-ups of regions 2, 3, and 4 in (e).

Fig. 4. Typical single-shot spectra. (a) DS to NLP. (b) NLP to DS.

Fig. 5. Dual-wavelength. (a) The spectrum of the dual-NLP in the logarithmic and linear scales. (b) The spectrum of the NLP-DS in the logarithmic and linear scales. (c) The spectrum of the dual-DS in the logarithmic and linear scales.

Fig. 6. Dual-color pulse characteristics. (a)–(d) The shot-to-shot spectra, pulse trains, RF spectrum, and autocorrelation trace of the dual-NLP. (e)–(h) The shot-to-shot spectra, pulse trains, RF spectrum, and autocorrelation trace of the NLP-DS. (i)–(l) The shot-to-shot spectra, pulse trains, RF spectrum, and autocorrelation trace of the dual-DS.

Fig. 7. Typical single-shot spectra for collision and spectral reconstruction. (a)–(c) Dual-NLP, NLP-DS, and dual-DS collision processes. (d)–(f) Dual-NLP, NLP-DS, and dual-DS spectral reconstruction processes.

Fig. 8. Close-ups of regions of two collisions of dual-color pulses and typical single-shot spectra.