Synchronization in Multiple Time Delay Chaotic Laser Diodes Subject to Incoherent Optical Feedbacks and Incoherent Optical Injection

TL;DR

This paper investigates synchronization phenomena in coupled chaotic laser diodes with multiple time delays under incoherent feedback and injection, analyzing stability, parameter effects, and security implications.

Contribution

It is the first to report on synchronization regimes in such laser diode systems with incoherent feedback and injection, including stability analysis and security considerations.

Findings

Identified conditions for lag, complete, and anticipating synchronization.

Analyzed the impact of parameter mismatches and noise on synchronization quality.

Highlighted the security potential due to sensitivity to parameter mismatches.

Abstract

We present the first report of the synchronization regimes in both unidirectionally and bidirectionally-coupled multiple time delay chaotic laser diodes subject to incoherent optical feedbacks and incoherent optical injection. We derive the existence conditions and numerically study the stability for lag, complete, and anticipating synchronization regimes and cascaded synchronization. We also study in detail the effect of parameter mismatches and noise on the synchronization quality. It is emphasized that sensitivity of the synchronization quality to parameter mismatches can lead to a high level of security due to the difficulty to replicate the receiver laser. We show that the injection current and feedback delay times are highly important parameters from this point of view.