Controlling chaos in some laser systems via variable coupling and feedback time delay

TL;DR

This paper demonstrates how variable coupling and feedback time delays can effectively control chaotic behavior in laser systems, transforming chaotic outputs into steady states and stabilizing wavelength chaos.

Contribution

It introduces a numerical approach to controlling chaos in laser systems using variable time delays in coupling and feedback mechanisms.

Findings

Chaos in laser intensity can be stabilized to steady states.

Wavelength chaos in tunable laser diodes can be controlled.

Variable time delays are effective in chaos control.

Abstract

We study numerically a system of two lasers cross-coupled optoelectronically with a time delay where the output intensity of each laser modulates the pump current of the other laser. We demonstrate control of chaos via variable coupling time delay by converting the laser intensity chaos to the steady state. We also show that wavelength chaos in an electrically tunable distributed Bragg reflector laser diode with a feedback loop can be controlled via variable feedback time delay.