Fig. 3: Experimental results of optical discretization and parallelization.

a Experimental setup to measure the optical discretization and parallelization capability of the APP chip. PD photodetector, Sync synchronization. b Temporal outputs from two sub-channels when the input single-tone signal is 8.1 GHz. c Measured amplitude ratio response of two sub-channels. d Measured phase difference frequency response between two sub-channels. e Measurement of the SNR over 1 h continuous operation