Search results for " incoherent waves"

showing 2 items of 2 documents

Wave dynamics and turbulence in multimode optical systems

2021

The subject of this thesis essentially focuses on the experimental and theoretical study of optical turbulence in different types of nonlinear media. The first part of the manuscript is devoted to the study of thermalization and condensation of optical waves during their propagation in graded-index multimode fibers. The analysis based on the wave turbulence theory reveals that the disorder inherent to light propagation in an optical fiber induces a significant acceleration of the process of optical thermalization, which can clarify the mechanism of certain regimes of spatial beam cleaning recently reported in the literature. We show experimentally that the optical field relaxes during its p…

Multimode optical fibersNonlinear opticsWave condensationFibres optiques multimodesThermalisation d’ondes incohérentes[PHYS.PHYS] Physics [physics]/Physics [physics]Wave turbulenceOptique non linéaireThermalization of incoherent wavesSolitonsCondensation d’ondesTurbulence d’ondes
researchProduct

Temporal Dynamics of Incoherent Nonlinear Waves

2014

We review different formalisms describing incoherent waves: the wave turbulence kinetic equation, the Vlasov equation in analogy with Gravitation, the weak Langmuir turbulence equation describing spectral solitons and incoherent dispersive shocks.

Physicsincoherent wavesLangmuir TurbulenceTurbulenceWave propagationturbulence incoherent waves solitonsturbulenceVlasov equationIncoherent scatterNonlinear opticsNOPhysics::Fluid DynamicsGravitationNonlinear systemClassical mechanicsPhysics::Plasma PhysicsPhysics::Space Physicssolitons
researchProduct