Coherent pulse interactions in mode-locked semiconductor lasers

Thomas G. Seidel, Julien Javaloyes and Svetlana V. Gurevich

Chaos, Solitons & Fractals, 2025, vol. 195, issue C

Abstract: We study the dynamics of multipulse solutions in mode-locked lasers in presence of time-delayed feedback stemming, e.g., from reflections upon optical elements, and carrier dynamics. We demonstrate that the dynamics of such a high dimensional problem can be successfully described by some effective equations of motion for the pulses’ phases and positions. Analyzing the reduced vector field permits disclosing a highly complex dynamics where coherent and incoherent interactions compete. The latter lead to regimes in which pulses can be equidistant or non-equidistant and also have different phase relations. Multi-stability between regimes is also observed as well as emerging limit cycles and global heteroclinic bifurcations in the reduced phase space.

Keywords: Passive mode-locking; Frequency combs; Bifurcation analysis (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:195:y:2025:i:c:s0960077925002577

DOI: 10.1016/j.chaos.2025.116244

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