Dynamics and synchronization phenomena of semiconductor lasers with delayed optical feedback

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This thesis successfully applies strategies to control the nonlinear dynamical properties of semiconductor lasers (SLs) with delayed optical feedback. It demonstrates how nonlinear dynamics can be harnessed for coherence-controlled sources and encrypted communications using chaotic carriers. SLs with delayed optical feedback exhibit intriguing dynamical phenomena, making them valuable for studying fundamental nonlinear dynamics, including high-dimensional chaotic emission. However, feedback-induced instabilities often hinder their technical applications, prompting efforts to suppress these issues. This work explores whether the complex dynamics can be utilized for practical applications, focusing on chaotic emission regimes. The study reveals how understanding the nonlinear behavior of SLs can tailor their emission properties, paving the way for new applications based on chaotic light. A key finding is the development of a tailored SL light source with a tunable coherence length ranging from 8 m to 130 µm, applicable in modern ranging measurement technologies like chaotic LIDAR systems. Additionally, the research investigates the synchronization of SL systems exhibiting broadband chaotic dynamics, demonstrating excellent synchronization that can be leveraged for cryptographic communication systems. These examples underscore the potential of applied nonlinear dynamics in creating innovative applications for SLs.