Fig. 4: Experimental results of a high-speed OWC system utilizing the OPA. | Nature Communications

Fig. 4: Experimental results of a high-speed OWC system utilizing the OPA.

From: Multi-target and ultra-high-speed optical wireless communication using a thin-film lithium niobate optical phased array

Fig. 4: Experimental results of a high-speed OWC system utilizing the OPA.

a Schematic of the 320 Gbps data transmission link. b DSP flowchart implemented at the transmitter and receiver. c Optical spectra of the 16-QAM signal recorded at different points within the system. d BERs measured at different wavelengths for transverse angles θ = 0° and θ = 31°, respectively. e Recovered constellation diagrams corresponding to each angle. PC polarization controller, EDFA erbium-doped fiber amplifier, IQM in-phase/quadrature modulator, EA electrical amplifier, DAC digital-to-analog converter, OPA optical phased array, DSO digital storage oscilloscope, QAM Quadrature Amplitude Modulation, RRC root-raised cosine, Syn. Synchronization, MIMO-FFE multiple-input multiple-output feed-forward equalizer, PF post-filter, MLSD maximum likelihood sequence detection, BER bit error rate, HD-FEC hard-decision forward error correction.

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