Li Pu, Sun Yuanyuan, Liu Xianglian, Yi Xiaogang, Zhang Jianguo, Guo Xiaomin, Guo Yanqiang, Wang Yuncai
Opt Lett. 2016 Jul 15;41(14):3347-50. doi: 10.1364/OL.41.003347.
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.
我们提出了一种基于全光子学的超快物理随机比特生成方法。该方法利用一个紧凑的非线性环镜（称为太赫兹光学非对称解复用器，TOAD）在全光域中对混沌光波形进行采样，然后通过与阈值电平进一步比较来生成随机比特流。这种方法可以有效克服现有随机比特生成器在实际中面临的电子抖动瓶颈。一个概念验证实验表明，该方法可以从具有光反馈的分布反馈激光二极管（DFB-LD）的混沌输出中连续提取5 Gb/s的随机比特流。这种有限的生成速率是由所用光学混沌的带宽造成的。
