Synchronization of a quantum-dash mode-locked (ML) Fabry–Perot laser diode with optically injected pulse streams is experimentally studied. Injected signals consist of nonmodulated and modulated trains of pulses at various repetition rates, ranging from 10 to and 10 to , respectively. Subharmonic, fundamental, and harmonic synchronization of the ML laser allows retrieval of stable clock pulses featuring a width of . Frequency components at 10 and do not create any amplitude modulation on the recovered clock pulses when injecting signals at 10 and . In addition, external synchronization of the laser with pulse streams at 80 and is sustained despite the absence of significant components at or below .
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