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Updated: Oct 21, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
A ring generator of two- and three-frequency quasiperiodic self-oscillations based on the van der Pol oscillator
Sergey V Astakhov1, Oleg V Astakhov2, Natalia S Fadeeva3
1Physics Faculty, Moscow State University, GSP-1, Leninskie Gory 1, building 2, Moscow 119991, Russia.
Abstract:
In this work, we present a model of an autonomous three-mode ring generator based on the van der Pol oscillator, where periodic, two-frequency quasiperiodic, three-frequency quasiperiodic, and chaotic self-oscillations are observed. The transitions to chaos occur as a result of a sequence of torus doubling bifurcations. When the control parameters are varied, the resonant limit cycles appear on a two-dimensional torus, and two-dimensional tori appear on a three-dimensional torus as a result of synchronization. We used a time series of dynamic variables, projections of phase portraits, Poincaré sections, and spectra of Lyapunov characteristic exponents to study the dynamics of the ring generator.
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