Fig. 1. Experimental setup of a channel-interleaved PADC with an AMLL for the optical sampling clock and a dual-output MZM for the photonic switch. AMLL, actively mode-locked laser; AMP, optical amplifier; MZM, Mach–Zehnder modulator; TDL, time delay line; PS, power splitter; BPF, band-pass filter; PD, photo-diode; ADC, analog-to-digital converter.

Fig. 2. Numerical simulation of the ratio of the spectrum power of digitized data with and without photonic demultiplexing as a function of the modulation index and phase offset.

Fig. 3. Measured power of the digitized data and the FoM (η) with different (a) powers and (b) phase offsets of the driving signal to the dual-output MZM. The symbols denote the experimentally measured data, and the solid curves represent the simulated results. (c) Microwave response of the PADC with and without photonic demultiplexing.

Fig. 4. (a), (b) FFT spectra of the digitized data of an 11 GHz single tone input signal in two demultiplexed channels, respectively. (c) FFT spectrum of the data reconstructed via the time interleaving of two channels.

Fig. 5. FFT spectra of the reconstructed data after mismatch compensation when the frequency of the input signal to be sampled is 11 and 31 GHz, respectively.