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Communication Dans Un Congrès Année : 2021

Loss induced multiple symmetry breakings in the Fermi Pasta Ulam recurrence process

Résumé

Fermi Pasta Ulam (FPU) recurrence process describes the ability of a nonlinear system to excite multiple modes and then to return to its initial state. In fiber optics, such process has been investigated within the framework of modulation instability (MI) [1], corresponding to growth of weak perturbations at the expense of a strong pump. Nonlinear stage of MI and FPU recurrences in optical fibers have been widely investigated and many results have been obtained with an efficient compensation of the losses [2]. Investigations on water waves [3] demonstrated that dissipation of their water tank forces the system to operate in a single regime. Here, we provide a deeper and complete study on the impact of dissipation of the FPU dynamics. Thanks to a fiber optics system, we have been able to control the loss coefficient, allowing us to trigger the different corresponding FPU regimes. Using a setup similar to the one in [2] and based on a multiple HOTDR system, we managed to record FPU recurrences in power and phase along the fiber length as a function of the loss, Fig. 1. The dissipation is controlled thanks to a counter-propagating Raman pump whose power is tuned to get an effective loss coefficient. A direct relation between the Raman pump power and effective loss coefficient is obtained, allowing a direct comparison between experiments (left panel) and simulations (right panel). Three different regions are discernible. In the 3 rd
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Dates et versions

hal-03442169 , version 1 (23-11-2021)

Identifiants

  • HAL Id : hal-03442169 , version 1

Citer

Guillaume Vanderhaegen, Pascal Szriftgiser, Matteo Conforti, Alexandre Kudlinski, Stefano Trillo, et al.. Loss induced multiple symmetry breakings in the Fermi Pasta Ulam recurrence process. CLEO Europe, Jun 2021, Munich, Germany. ⟨hal-03442169⟩
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