Modulation instability of discrete angular momentum in coupled fiber rings

Calum Maitland*, Daniele Faccio, Fabio Biancalana

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
16 Downloads (Pure)


We present an analysis of temporal modulation instability in a ring array of coupled optical fibers. Continuous-wave signals are shown to be unstable to perturbations carrying discrete angular momenta, both for normal and anomalous group velocity dispersion. We find the frequency spectrum of modulation instability is different for each perturbation angular momentum and depends strongly on the coupling strength between fibers in the ring. Twisting the ring array also allows the frequency spectra to be tuned through the induced tunnelling Peierls phase.

Original languageEnglish
Article number065504
JournalJournal of Optics
Issue number6
Early online date28 May 2019
Publication statusPublished - Jun 2019


  • fibre optics
  • modulation instability
  • orbital angular momentum of light

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


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