We report, to the best of our knowledge, the first demonstration of 320 Gb/s all-optical clock recovery and all-optical
time de-multiplexing after 51 km transmission by exploiting single-quantum dash mode-locked laser diode
(QD-MLLD). Based on injection locking of the QD-MLLD, the 40 GHz synchronized optical clock pulses were
recovered from the 320 Gb/s with a pulse width of 1.9 ps and timing jitter of 135 fs, which allowed directly time
de-multiplexing of 320–40 Gb/s without additional complex optoelectronic circuitry. The 320–40 Gb/s all-optical
de-multiplexing was achieved with averaging a power penalty of 4.5 dB at BER of 1E-6.