Turbulence Investigation at Small Scale by Angle-of-arrival Fluctuations of a Laser Beam

In this paper the possibility is investigated of deriving information on the shape of the structure function of the refractive index of a turbulent medium at small scales (or, which amounts to the same thing, on the shape of the power spectrum at a high-wavenumber) from measurements of angle-of-arrival fluctuations of an optical wave propagated through it. As a result, a method is also devised for the determination of the inner scale of the turbulence.