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Poster De Conférence Année : 2017

Bounded-phase chaotic dynamics in a vectorial laser

Résumé

Summary form only given. Bounded-phase dynamics, also called phase-trapping or frequency-locking without phase-locking, is a synchronization regime found when a phase-locked state bifurcates via a Hopf bifurcation to self-sustained phase and amplitude oscillations. After the instability, the coupled oscillators are not phase-locked anymore, yet they maintain frequency-locking and synchronization [1]. This phenomenon is rather universal, and has been demonstrated for instance in semiconductor and solid-state lasers, in hydrodynamics and in nanomechanical resonators. Recently, the relevance of these underdamped and self-sustained phase oscillations has also started to be investigated for the synchronization of quantum systems [2].To date, observations of the bounded-phase regime have been limited to smooth, supercritical bifurcations. The aim of this contribution is to present an experiment in which a phase-locked state undergoes a subcritical bifurcation leading directly to a chaotic state. We demonstrate the existence of a regime characterized by chaotic phase and amplitude oscillations, and prove that frequency-locking can be maintained, i.e. that bounded-phase synchronization is possible also in the presence of chaotic dynamics. Furthermore, by measuring the phase noise spectrum of the oscillator, we show that the beat-note signal still keeps a good spectral purity at low frequencies, in spite of the chaotic phase oscillations.
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Dates et versions

hal-01561755 , version 1 (13-07-2017)

Identifiants

Citer

Aurélien Thorette, Marco Romanelli, Marc Brunel, Marc Vallet. Bounded-phase chaotic dynamics in a vectorial laser. Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference 2017 (CLEO-Europe/EQEC 2017), Jun 2017, Munich, Germany. IEEE Xplore Digital Library, pp.17314439, 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). ⟨10.1109/CLEOE-EQEC.2017.8087570⟩. ⟨hal-01561755⟩
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