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arXiv 0711.0761nlin.CD
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存在时滞时互耦合激光器的零滞后同步

Zero Lag Synchronization of Mutually Coupled Lasers in the Presence of Delays

Alexandra S. Landsman, Leah B. Shaw, Ira B. Schwartz

摘要:

考虑三个相互耦合的激光器组成的具有时间延迟的传输线,研究外部激光器的混沌同步。介绍了两种不同的系统:光电耦合半导体激光器和光耦合光纤激光器。虽然这两个系统的动力学是非常不同的,但在两种情况下,在一定的参数范围内都可以获得端激光器的鲁棒同步。在这里,我们提出的分析和数值模拟来解释一些观察到的同步现象。首先,我们介绍了三个耦合的半导体激光器的系统,并讨论了振荡的发生,通过一个分叉的耦合强度增加。接下来,我们通过研究横向于同步态的动力学来分析末端激光器的同步。我们证明了在足够长的延迟下,外半导体激光器的混沌同步将发生,并与驱动耗散系统的广义同步进行了比较。结果表明,同步态的稳定性(由横向于同步流形的负Lyuppery指数表示)取决于外部激光器的内部耗散。接下来,我们提出了三个耦合光纤激光器的数值模拟,突出了半导体和光纤激光器系统之间的一些差异。由于光纤激光器中存在大量的耦合模,这是一个很好的研究时空混沌的系统。随机噪声包括在光纤激光器模型中,并且即使在非常小的耦合强度下也观察到外部激光器的同步。

英文摘要:

We consider a line of three mutually coupled lasers with time delays and study chaotic synchronization of the outer lasers. Two different systems are presented: optoelectronically coupled semiconductor lasers and optically coupled fiber lasers. While the dynamics of the two systems are very different, robust synchronization of end lasers is obtained in both cases over a range of parameters. Here, we present analysis and numerical simulation to explain some of the observed synchronization phenomena. First, we introduce the system of three coupled semiconductor lasers and discuss the onset of oscillations that occurs via a bifurcation as the coupling strength increases. Next, we analyze the synchronization of the end lasers by examining the dynamics transverse to synchronized state. We prove that chaotic synchronization of the outer semiconductor lasers will occur for sufficiently long delays, and we make a comparison to generalized synchronization in driven dissipative systems. It is shown that the stability of synchronous state (as indicated by negative Lyupunov exponents transverse to the synchronization manifold) depends on the internal dissipation of the outer lasers. We next present numerical simulations for three coupled fiber lasers, highlighting some of the differences between the semiconductor and fiber laser systems. Due to the large number of coupled modes in fiber lasers, this is a good system for investigating spatio-temporal chaos. Stochastic noise is included in the fiber laser model, and synchrony of the outer lasers is observed even at very small coupling strengths.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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