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纳米激光器（NL）是实现光集成的重要光学元件，近年来成为研究热点之一。然而，对于NL在混沌同步方向上的研究仍较为稀少。本文提出一种基于NL的双路激光混沌复用系统，并详细研究了其同步性能。研究中还创新性地引入了主被动分解法，通过主动和被动信号的分解实现高效的信号处理和复用。具体而言，通过建立速率方程模型，探究了NL两个关键参数（Purcell因子F、自发辐射耦合因子β、系统参数、单参数失配以及多参数同时失配对同步性能的影响。研究结果表明，通过合理的选择系统的参数配置，两主激光器可以在较大的参数范围内保持较低的相关性，同时确保主从激光器间保持高品质的混沌同步，满足混沌复用系统的条件。此外，单参数失配对主激光器间同步性的影响具有差异性，但对配对激光器的同步性影响较小;多参数失配时，系统仍能在广泛的参数失配范围内满足两主激光器混沌输出的“伪正交性”要求。这一结果不仅验证了所提系统的可行性，还充分体现了主动被动分解法在推动NL混沌同步研究中的重要价值，为该领域的发展提供了新思路。Nanolaser (NL), as an important optical source device, has a significant impact on photonic integrated circuits and has become a research hotspot in recent years. This study investigates the synchronization performance of a dual-channel laser chaotic multiplexing system based on NLs and employs an active-passive decomposition to enhance signal processing and multiplexing efficiency. By establishing a rate equation model, the synchronization characteristics of the system were analyzed, focusing on the effects of two key parameters—the Purcell factor (F) and the spontaneous emission coupling factor (β)—as well as system parameters, single-parameter mismatches, and multi-parameter mismatches. Numerical simulations show that, with proper parameter configurations, the two master NLs can maintain low correlation, ensuring the "pseudo-orthogonal" of chaotic signals while achieving high-quality chaotic synchronization with their paired slave NLs. The study found that both the Purcell factor (F) and the spontaneous emission coupling factor (β) significantly influence the synchronization performance of the system, and the optimal parameter ranges for achieving high-quality synchronization were identified. Additionally, the effects of feedback strength and frequency detuning were explored, revealing that frequency detuning plays a more critical role in the synchronization between the master NLs. The impact of parameter mismatches on system synchronization performance was also emphasized. The system exhibits robustness against single-parameter mismatches, with minimal impact on master-slave synchronization quality. However, multi-parameter mismatches introduce more complex effects. Compared to traditional semiconductor laser systems, this system can maintain "pseudo-orthogonal" over a wider parameter range, achieving higher security and lower channel interference. This research lays a theoretical foundation for chaos synchronization based on NLs and provides new insights for designing secure, stable, and efficient optical communication systems.
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Keywords:
- nanolaser /
- chaotic synchronization /
- master-slave decomposition method /
- chaotic multiplexing
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