Effect of atmospheric turbulence on modulational instability in laser-pulse propagation

Effet de la turbulence atmosphérique sur l'instabilité modulationnelle dans la propagation des impulsions laser

Bourdier, Alain ; Diels, Jean-Claude ; Ghalila, Hassen ; Delage, Olivier

Multiple filamentation is a major problem for laser pulse propagation in the atmosphere. In this article, we study the influence of a turbulent atmosphere on the growth of the modulational instability which is the cause of multiple filamentation. It is shown that the growth rate of this instability decreases when it is considered that the index of refraction has a stochastic behavior. A good qualitative agreement between the analytical and numerical results is obtained.</p>

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