Sensitivity Analysis of a Star Optical Network Based on Mutually Coupled Semiconductor Lasers

In the absence of optical isolation, semiconductor lasers (SLs) are susceptible to external perturbations that determine the dynamical properties of the generated signals. Mutually coupled SL systems have been proved to exhibit diverse dynamics with the potential to behave synchronously. In this study, a multinodal star all-optical network topology is investigated in terms of synchronization and robustness; 50 SLs with varied operating frequencies around a central frequency operate as star nodes and mutually interact with a central SL (hub) through optical injection signals and under specific conditions exhibit a synchronized behavior. Additional nodes that are subsequently connected to the network or nodes that disconnect from the network do not alter the dynamical behavior and the robustness of the system. Especially for the newly connected nodes, appropriate optimization in their operating conditions includes them in the synchronized cluster.