IEEE Access (Jan 2018)

Multi-Channel Physical Random Bits Generation Using a Vertical-Cavity Surface-Emitting Laser Under Chaotic Optical Injection

  • Xi Tang,
  • Guang-Qiong Xia,
  • Elumalai Jayaprasath,
  • Tao Deng,
  • Xiao-Dong Lin,
  • Li Fan,
  • Zi-Ye Gao,
  • Zheng-Mao Wu

DOI
https://doi.org/10.1109/ACCESS.2018.2800095
Journal volume & issue
Vol. 6
pp. 3565 – 3572

Abstract

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We experimentally demonstrate multi-channel physical random bits (PRBs) generation by utilizing chaotic outputs from two linear polarization modes in a vertical-cavity surface-emitting laser (VCSEL) under a chaotic optical injection. The polarization-resolved chaotic signal is obtained with a master-VCSEL subject to optical feedback, and then injects into a slave-VCSEL for driving its two linear polarization modes into chaotic state. We analyze the influences of injection parameters on bandwidth, complexity, and the correlation of two-channel chaotic signals. By using the two chaotic signal outputs from the slave-VCSEL under optimized parameters as entropy sources, we have obtained the PRBs at the dual-channel rate of 160 Gbits/s by adopting the m least significant bits extraction with logical exclusive-OR (XOR) post-processing. Further utilizing the n-bit cross-merging method, the PRB at a rate of 320 Gbits/s could be obtained.

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