Complete and partial time-delay signature suppression in a laser array

A A Petrenko; A V Kovalev; E A Viktorov

doi:10.1063/5.0166647

Complete and partial time-delay signature suppression in a laser array

Chaos. 2023 Oct 1;33(10):103102. doi: 10.1063/5.0166647.

Authors

A A Petrenko¹, A V Kovalev¹, E A Viktorov¹

Affiliation

¹ Institute of Advanced Data Transfer Systems, ITMO University, 199034 Saint Petersburg, Russia.

PMID: 37782828
DOI: 10.1063/5.0166647

Abstract

We model dynamics of a quantum dot based micropillar laser array subject to the time-delayed optical feedback. The global coupling provided by the feedback generates a rich set of various instabilities including chaotic regimes with strong time-delay signature in the autocorrelation function. We demonstrate that the dispersion of the array coupling phases leads to effective suppression of the time-delay signature due to the dispersion of the system's internal timescales. We find that the transition to the complete suppression of the time-delay signature appears via a chimera state where highly correlated and non-correlated laser outputs coexist. The degree of correlation in the chimera state depends on the coupling phase dispersion.