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

A A Petrenko1, A V Kovalev1, E A Viktorov1

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Summary
This summary is machine-generated.

We studied quantum dot laser arrays with time-delayed feedback, finding that phase dispersion suppresses time-delay signatures. This leads to chimera states with mixed laser outputs, controlled by coupling phase dispersion.

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Area of Science:

  • Quantum optics
  • Nonlinear dynamics
  • Laser physics

Background:

  • Quantum dot micropillar lasers are crucial for optoelectronics.
  • Time-delayed optical feedback can induce complex dynamics and instabilities.
  • Understanding laser array behavior is key for advanced photonic devices.

Purpose of the Study:

  • To model the dynamics of a quantum dot micropillar laser array with time-delayed optical feedback.
  • To investigate the effect of coupling phase dispersion on system instabilities and time-delay signatures.
  • To explore the emergence of chimera states in such laser arrays.

Main Methods:

  • Numerical modeling of a quantum dot based micropillar laser array.
  • Analysis of system dynamics under global coupling with time-delayed optical feedback.
  • Investigation of autocorrelation functions to identify time-delay signatures.
  • Study of coupling phase dispersion effects on laser output correlations.

Main Results:

  • Global coupling generates instabilities and chaotic regimes with clear time-delay signatures.
  • Dispersion in array coupling phases effectively suppresses the time-delay signature.
  • A transition to suppressed time-delay signatures occurs via a chimera state.
  • The degree of correlation in chimera states is dependent on coupling phase dispersion.

Conclusions:

  • Coupling phase dispersion is a critical parameter for controlling dynamics in laser arrays.
  • Chimera states offer a pathway to suppress unwanted time-delay signatures in photonic systems.
  • This research provides insights into the complex dynamics of coupled nonlinear systems with applications in laser design.