Optical injection in semiconductor ring lasers

TL;DR

This paper explores the complex dynamical behaviors of semiconductor ring lasers under optical injection, revealing multiple coexistence regimes, bifurcations, and a unique antiphase chaotic state through numerical and theoretical analysis.

Contribution

It provides the first detailed theoretical analysis of optical injection effects in semiconductor ring lasers, identifying new dynamical regimes and chaos mechanisms.

Findings

Two parameter regions with coexisting injection-locked solutions

A region with coexistence of frequency-locked limit cycle and injection-locked solution

Discovery of an antiphase chaotic regime without carrier dynamics

Abstract

We theoretically investigate optical injection in semiconductor ring lasers and disclose several dynamical regimes. Through numerical simulations and bifurcation continuation, two separate parameter regions in which two different injection-locked solutions coexist are revealed, in addition to a region in which a frequency-locked limit cycle coexists with an injection-locked solution. Finally, an antiphase chaotic regime without the involvement of any carrier dynamics is revealed. Parallels are drawn with the onset of chaos in the periodically forced Duffing oscillator.