Fig. 1. Structure of DC-PCF

Fig. 2. Structure of dual-channel PTS-ADC system. MLL: mode-locked laser; WDM: wavelength division multiplexer; VDL: variable delay line; VOA: variable optical attenuator; EDFA: erbium doped fiber amplifier; OBPF: optical band-pass filter; ADC: analog-to-digital converter

Fig. 3. Simulation structure of dual-channel PTS-ADC system

Fig. 4. Spectral distribution of time domain and frequency domain of optical pulse sequences by wavelength-time-interleaved sample. (a) Spectrum of mode-locked laser; (b) time-domain amplification

Fig. 5. Time-domain broadening of optical pulse after DC-PCF. (a) Time domain diagram of channel 1; (b) enlarged time domain diagram

Fig. 6. Time-domain broadening of optical pulse after DCF. (a) Time domain diagram of channel 1; (b) enlarged time domain diagram

Fig. 7. DC-PCF. (a) Channel 1; (b) channel 2; (c) time domain diagram of two signals overlapped; (d) signals after fitting

Fig. 8. DCF. (a) Channel 1; (b) channel 2; (c) time domain diagram of two signals overlapped; (d) signals after fitting

Fig. 9. PTS-ADC system ENOB contrast diagram

Fig. 10. Sampling recovery signal when pulse sequence timing is inconsistent. (a) DC-PCF; (b) DCF

Fig. 11. Relationship between modulation depth and ENOB