45 Gbps high-speed real-time physical random bit generator | Zendy

Anbang Wang | Zendy; Pu Li | Zendy; Jianguo Zhang | Zendy; Jianzhong Zhang | Zendy; Lei Li | Zendy; Yuncai Wang | Zendy

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45 Gbps high-speed real-time physical random bit generator

Author(s) -

Anbang Wang,

Pu Li,

Jianguo Zhang,

Jianzhong Zhang,

Lei Li,

Yuncai Wang

Publication year - 2013

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.21.020452

Subject(s) - chaotic , randomness , random number generation , signal generator , pseudorandom binary sequence , signal (programming language) , computer science , generator (circuit theory) , optics , bitstream , binary number , semiconductor laser theory , laser , physics , electronic engineering , power (physics) , algorithm , mathematics , telecommunications , chip , statistics , engineering , decoding methods , arithmetic , quantum mechanics , artificial intelligence , programming language

We report a prototype of high-speed real-time physical random bit generator based on a chaotic laser. The chaotic laser consists of a semiconductor laser with optical feedback in fiber external cavity configuration. The chaotic laser intensity signal is quantized into binary stream by differential comparison which makes the amplitude distribution symmetric with respect to zero mean value. An exclusive-OR gate operation between two raw binary streams from the chaotic signal and its delayed signal is used to overcome the influences of the weak periodicity induced by the external cavity resonance inherent in the chaotic laser. After exclusive-OR operation, the prototype can generate a single fast random bit stream in real time without any off-line processing procedures. Its bit rate can be handily and continuously tuned up to 4.5 Gbps by a trigger clock. Experiment results demonstrate that our generator possesses high-quality randomness with verified by the three-standard-deviation criterion and industry-benchmark statistical tests.

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