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<p>To enhance the transmission capacity and security of confidential optical communication systems, this paper proposes and demonstrates a multi-channel random chaotic encryption scheme that adopts the wavelength division multiplexing (WDM) concept solely for parallel chaos generation. Unlike conventional WDM communication systems, our approach utilizes a WDM-structured array of chaotic carriers for encryption but does not rely on WDM for the underlying data transmission. A single dual-laser source with optical feedback is used to generate a complex chaotic seed, which is then demultiplexed and modulated to form multiple encrypted channels. This architecture enables dynamic random encryption across these independent channels, significantly expanding the key space. Simulation results show a stable 40 Gbit/s OOK signal encryption over 100&#xa0;km, with excellent error rate optimization and robustness under challenging conditions, such as parameter mismatch conditions and supercritical conditions. The proposed multi-channel architecture surpasses traditional single-channel chaotic communication systems by enhancing both communication capacity and confidentiality. This research lays the groundwork for applying chaotic optical communication in complex settings, with potential uses in military communications, intelligent sensing networks, and future 6G technology.</p>

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Design and performance analysis of multi-channel random encryption system based on WDM-structured chaotic carriers

  • 期刊论文

  • 发表日期：

    2025年11月21日

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  • Jingqi Yin,
  • Xuefang Zhou

摘要

To enhance the transmission capacity and security of confidential optical communication systems, this paper proposes and demonstrates a multi-channel random chaotic encryption scheme that adopts the wavelength division multiplexing (WDM) concept solely for parallel chaos generation. Unlike conventional WDM communication systems, our approach utilizes a WDM-structured array of chaotic carriers for encryption but does not rely on WDM for the underlying data transmission. A single dual-laser source with optical feedback is used to generate a complex chaotic seed, which is then demultiplexed and modulated to form multiple encrypted channels. This architecture enables dynamic random encryption across these independent channels, significantly expanding the key space. Simulation results show a stable 40 Gbit/s OOK signal encryption over 100 km, with excellent error rate optimization and robustness under challenging conditions, such as parameter mismatch conditions and supercritical conditions. The proposed multi-channel architecture surpasses traditional single-channel chaotic communication systems by enhancing both communication capacity and confidentiality. This research lays the groundwork for applying chaotic optical communication in complex settings, with potential uses in military communications, intelligent sensing networks, and future 6G technology.