Differential phase-shift keying heterodyne coherent detection with local oscillation enhancement

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“…However, the scheme can only demodulate BPSK signals. In 2018, Zhang et al proposed a differential phase-shift keying heterodyne coherent detection with local oscillation enhancement [17] . In 2020, Xuan et al proposed an integrated coherent optical receiver with feed-forward carrier recovery and achieved a BER better than 10 −6 for BPSK at 10 Gbit/s [18] .…”