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Abstract <p>This paper presents a method for generating random bits using a semiconductor laser with optoelectronic feedback, which induces chaotic dynamics. Numerical simulations of the system equations, incorporating the alpha factor and time delay, revealed that for τ &gt; 2.5 ns, the system transitions to a chaotic regime, confirmed by a continuous intensity spectrum. For bit generation, the chaotic signal was sampled at 40 GHz, followed by 8-bit quantization and extraction of the 4 least significant bits. The resulting sequence of bits successfully passed all 15 NIST SP 800-22 tests, including frequency, entropy, and correlation assessments. The implemented scheme demonstrates a generation rate of up to 160 Gbit/s, highlighting its potential for high-performance security systems.</p>

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Random Bit Generation in VCSEL with Delayed Optoelectronic Feedback

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • A. A. Krents,
  • E. A. Yarunova,
  • N. E. Molevich

摘要

Abstract

This paper presents a method for generating random bits using a semiconductor laser with optoelectronic feedback, which induces chaotic dynamics. Numerical simulations of the system equations, incorporating the alpha factor and time delay, revealed that for τ > 2.5 ns, the system transitions to a chaotic regime, confirmed by a continuous intensity spectrum. For bit generation, the chaotic signal was sampled at 40 GHz, followed by 8-bit quantization and extraction of the 4 least significant bits. The resulting sequence of bits successfully passed all 15 NIST SP 800-22 tests, including frequency, entropy, and correlation assessments. The implemented scheme demonstrates a generation rate of up to 160 Gbit/s, highlighting its potential for high-performance security systems.