Fig. 4: Experimental results of broadband multifunctional integrated demonstration using the APP chip. | Light: Science & Applications

Fig. 4: Experimental results of broadband multifunctional integrated demonstration using the APP chip.

From: Analog parallel processor for broadband multifunctional integrated system based on silicon photonic platform

Fig. 4

a Structure of the broadband signal parallel processing. The input analog signals are temporally discretized and parallelized in the APP chip. The algorithm and coefficients of multipliers are decomposed in the same order. Output results from each channel are combined in pairs to reconstruct the complete processing result. b The temporal waveforms from each sub-channel and reconstruction result. The data rate of each sub-channel is 20 GHz and the data rate of reconstructed waveform is 40 GHz. c Pulse compression results of each sub-channel; fusion result of two sub-channels (blue solid line in the bottom); direct processing result (red dashed line in bottom). d Temporal waveforms and constellation diagrams of sub-channel 1 (orange lines) and sub-channel 2 (blue lines). e Fused constellation diagram of two sub-channels (blue dots); direct processing result (red cross dots)

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