Department of Information and Computer Sciences, Saitama University, 255 Shimo-Okubo Sakura-ku, Saitama City, Saitama 338-8570, Japan.
Department of Applied Physics, School of Advanced Science and Engineering, Faculty of Science and Engineering, Waseda University 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan.
Phys Rev E. 2017 Sep;96(3-1):032216. doi: 10.1103/PhysRevE.96.032216. Epub 2017 Sep 18.
Synchronization properties of chaotic dynamics in two mutually coupled semiconductor lasers with optical feedback embedded in a photonic integrated circuit are investigated from the point of view of their dynamical content. A phenomenon in which the two lasers can show qualitatively different synchronization properties according to the frequency range of investigation and their nonlinear dynamics is identified and termed dynamics-dependent synchronization. In-phase synchronization is observed for original signals and antiphase synchronization is observed for low-pass filtered signals in the case where one of the lasers shows chaotic oscillations while the other laser exhibits low-frequency fluctuations dynamics. The experimental conditions causing the synchronization states to vary according to the considered frequency interval are studied and the key roles of asymmetric coupling strength and injection currents are clarified.
从动态内容的角度研究了嵌入在光子集成电路中的两个相互耦合半导体激光器中混沌动力学的同步特性。 发现了一种现象，即根据研究的频率范围及其非线性动力学，两个激光器可以表现出定性上不同的同步特性，并将其称为与动力学相关的同步。 在一种情况下，当一个激光器显示混沌振荡而另一个激光器显示低频波动动力学时，对于原始信号观察到同相同步，而对于低通滤波信号观察到反相同步。 研究了导致根据所考虑的频率间隔使同步状态变化的实验条件，并阐明了非对称耦合强度和注入电流的关键作用。
