Abstract

Synchronization of a 40GHz 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 1.6ps pulses at various repetition rates, ranging from 10 to 160GHz and 10 to 160Gbps, respectively. Subharmonic, fundamental, and harmonic synchronization of the ML laser allows retrieval of stable 40GHz clock pulses featuring a width of 1.8ps. Frequency components at 10 and 20GHz do not create any amplitude modulation on the recovered 40GHz clock pulses when injecting signals at 10 and 20GHz/Gbps. In addition, external synchronization of the laser with pulse streams at 80 and 160GHz/Gbps is sustained despite the absence of significant components at or below 40GHz.

© 2011 Optical Society of America

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