Mu Penghua, Pan Wei, Li Nianqiang
Opt Express. 2018 Jun 11;26(12):15642-15655. doi: 10.1364/OE.26.015642.
We report on the dynamics of free-running and optically injected VCSELs. In particular, the powerful measures including the 0-1 test for chaos and permutation entropy are used for locating the chaotic dynamics in a free-running VCSEL, which illustrates the effects of some key parameters on the chaotic region. In order to enhance chaotic dynamics, the output of the free-running VCSEL (master) is injected to another free-running VCSEL (slave). Our results show that the chaotic dynamics of the slave VCSEL can be greatly enhanced, i.e., both the bandwidth and complexity, while this occurs only outside of the injection locking region where the correlation between the mater and slave lasers is low. To take advantage of these enhanced chaotic dynamics exhibiting extremely high complexity and broadband bandwidth, a three-laser synchronization scheme is proposed and demonstrated. These findings pave the way to the generation of high-quality chaos (no time-delay signature, high bandwidth and complexity) and notably chaos-based applications based on free-running and optically injected VCSELs.
我们报告了自由运行和光注入垂直腔面发射激光器（VCSEL）的动力学特性。特别地，包括用于混沌的0-1测试和排列熵在内的有力方法被用于确定自由运行的VCSEL中的混沌动力学，这说明了一些关键参数对混沌区域的影响。为了增强混沌动力学，将自由运行的VCSEL（主激光器）的输出注入到另一个自由运行的VCSEL（从激光器）。我们的结果表明，从VCSEL的混沌动力学可以得到极大增强，即带宽和复杂度都得到提高，而这种情况仅发生在主从激光器之间相关性较低的注入锁定区域之外。为了利用这些展现出极高复杂度和宽带宽的增强混沌动力学，我们提出并演示了一种三激光器同步方案。这些发现为产生高质量混沌（无时间延迟特征、高带宽和复杂度）以及特别是基于自由运行和光注入VCSEL的混沌应用铺平了道路。
