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. 2017 Apr 21;6(4):e16253. doi: 10.1038/lsa.2016.253

Figure 3.

Figure 3

Time-domain characterization of the broadband mode-locked comb at stage III. (a, b) Amplitude and phase of the comb lines in the C-band. Although the amplitude of the pump line is very close at the through and drop ports, a clear phase difference can be observed. (c, d) Reconstructed waveforms at the through and drop ports, showing bright and dark pulses, respectively. Inst. freq.: instantaneous frequency. (e, f) Results of self-referenced cross-correlation, which are consistent with c and d.