Observation of Arnold Tongues in Coupled Soliton Kerr Frequency Combs.

  title={Observation of Arnold Tongues in Coupled Soliton Kerr Frequency Combs.},
  author={Jae K Jang and Xingchen Ji and Chaitanya Joshi and Yoshitomo Okawachi and Michal Lipson and Alexander L. Gaeta},
  journal={Physical review letters},
  volume={123 15},
We demonstrate various regimes of synchronization in systems of two coupled cavity soliton-based Kerr frequency combs. We show subharmonic, harmonic, and harmonic-ratio synchronization of coupled microresonators, and reveal their dynamics in the form of Arnold tongues, structures that are ubiquitous in nonlinear dynamical systems. Our experimental results are well corroborated by numerical simulations based on coupled Lugiato-Lefever equations. This Letter illustrates the newfound degree of… 

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