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Fully photonics-based physical random bit generator
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DOI：10.1364/OL.41.003347.png)
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Abstract
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We propose a fully photonics-based approach for ultrafast physical random bit generation. This approach exploits a compact nonlinear loop mirror (called a terahertz optical asymmetric demultiplexer, TOAD) to sample the chaotic optical waveform in an all-optical domain and then generate random bit streams through further comparison with a threshold level. This method can efficiently overcome the electronic jitter bottleneck confronted by existing RBGs in practice. A proof-of-concept experiment demonstrates that this method can continuously extract 5 Gb/s random bit streams from the chaotic output of a distributed feedback laser diode (DFB-LD) with optical feedback. This limited generation rate is caused by the bandwidth of the used optical chaos. (C) 2016 Optical Society of America
Keywords:
INJECTED SEMICONDUCTOR-LASER
RANDOM NUMBER GENERATOR
BANDWIDTH
CHAOS
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