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首页> 外文期刊>Applied optics >Delay line length selection in generating fast random numbers with a chaotic laser
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Delay line length selection in generating fast random numbers with a chaotic laser

机译：使用混沌激光生成快速随机数时的延迟线长度选择

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摘要

The chaotic light signals generated by an external cavity semiconductor laser have been experimentally demonstrated to extract fast random numbers. However, the photon round-trip time in the external cavity can cause the occurrence of the periodicity in random sequences. To overcome it, the exclusive-or operation on corresponding random bits in samples of the chaotic signal and its time-delay signal from a chaotic laser is required. In this scheme, the proper selection of delay length is a key issue. By doing a large number of experiments and theoretically analyzing the interplay between the Runs test and the threshold value of the autocorrelation function, we find when the corresponding delay time of autocorrelation trace with the correlation coefficient of less than 0.007 is considered as the delay time between the chaotic signal and its time-delay signal, streams of random numbers can be generated with verified randomness.
机译：实验证明，外腔半导体激光器产生的混沌光信号可以提取快速随机数。但是，外腔中的光子往返时间可能导致随机序列出现周期性。为了克服它，需要对混沌信号及其来自混沌激光器的时间延迟信号的样本中的相应随机位进行异或运算。在该方案中，正确选择延迟长度是一个关键问题。通过大量实验并从理论上分析了Runs检验和自相关函数阈值之间的相互作用，我们发现将相关系数小于0.007的自相关迹线的相应延迟时间视为之间的延迟时间。在混沌信号及其时间延迟信号的作用下，可以生成经过验证的随机性的随机流。

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