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A 1.28 Tbaud data signal is demonstrated, which is the highest symbol rate yet reported. The data signal is formed by optical time-division multiplexing of 128 data channels at 10 Gbit/s OOK in a single polarisation. The generated 1.28 Tbit/s data signal is demultiplexed in a nonlinear optical loop mirror, resulting in error-free performance with a BER 10-9 for all 128 demultiplexed channels.
Pre-scaled clock recovery of a serial 640 Gbit/s data signal is demonstrated using a quasi-phase-matching periodically poled lithium niobate module as an ultrafast phase comparator in an optoelectronic phase- locked loop.
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