F. R. Ruiz-Oliveras

TL;DR: In this paper, the authors proposed a secure optical communication system based on the principles of generalized and complete chaotic synchronization, where a transmitter and a receiver composed by two chaotic external-cavity semiconductor lasers are coupled in a master-slave configuration to provide generalized synchronization, while the master lasers in the transmitter and in the receiver are completely synchronized through the synchronization channel via an optical fiber.

TL;DR: It is found that a receiver subject to a feedback similar to that of the emitter shows better synchronization with the master laser when compared with a receiver without feedback (open-loop receiver).

TL;DR: Depending on both the laser operating point and the coupling strength, different bifurcations and diverse dynamical regimes occur in the route from asynchronous motion to complete synchronization of monostable and bistable lasers.

TL;DR: Different periodic, quasiperiodic, chaotic, and steady-state regimes form Arnold's tongues in bi-dimensional parameter spaces of the length and feedback strengths of the external cavities and the pump parameter, which gives additional possibility for controlling complex dynamics and chaos in a semiconductor laser with external Cavities by properly adjusting their lengths and feedback strength.

TL;DR: A detailed numerical study of the dynamics of two unidirectionally coupled semiconductor lasers subject to filtered optical feedback shows that this chaos-based communication scheme allows for an improvement in the decoding of encrypted messages in comparison with the conventional feedback scheme.