title: Strong scintillations of pulsed Laguerrian beams in a turbulent atmosphere.
abstract: Turbulent fluctuations of the energy density of broadband pulsed Laguerre-Gaussian beams are studied based on numerical solution of the parabolic wave equation for the complex spectral amplitude of the wave field by the split-step method. It is shown that in the regime of strong scintillations, the relative variance of energy density of the pulsed beams can take values smaller than unity, in contrast to the strong scintillation index of the continuous-wave beams, which tends to unity with increasing the turbulence strength. The level of residual spatial correlation of the energy density of pulsed beams exceeds that for the continuous-wave beams. It increases with shortening of the pulse duration and increasing of the refractive turbulence strength.
authors.forename: Viktor A
authors.initials: VA
authors.lastname: Banakh
authors.forename: Liliya O
authors.initials: LO
authors.lastname: Gerasimova