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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 17 — Aug. 26, 2013
  • pp: 20452–20462

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

Anbang Wang, Pu Li, Jianguo Zhang, Jianzhong Zhang, Lei Li, and Yuncai Wang  »View Author Affiliations


Optics Express, Vol. 21, Issue 17, pp. 20452-20462 (2013)
http://dx.doi.org/10.1364/OE.21.020452


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Abstract

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.

© 2013 OSA

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(140.1540) Lasers and laser optics : Chaos
(140.5960) Lasers and laser optics : Semiconductor lasers
(190.3100) Nonlinear optics : Instabilities and chaos

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: May 23, 2013
Revised Manuscript: July 16, 2013
Manuscript Accepted: August 5, 2013
Published: August 23, 2013

Citation
Anbang Wang, Pu Li, Jianguo Zhang, Jianzhong Zhang, Lei Li, and Yuncai Wang, "4.5 Gbps high-speed real-time physical random bit generator," Opt. Express 21, 20452-20462 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-17-20452


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