Multifractal characteristics of optical turbulence measured through a   single beam holographic process
  We have previously shown that azopolymer thin films exposed to coherent light that has travelled through a turbulent medium produces a surface relief grating containing information about the intensity of the turbulence; for instance, a relation between the refractive index structure constant C2 as a function of the surface parameters was obtained. In this work, we show that these films capture much more information about the turbulence dynamics. Multifractal detrended fluctuation and fractal dimension analysis from images of the surface roughness produced by the light on the azopolymer reveals scaling properties related to those of the optical turbulence. 
Dario G. Perez, Regis Barille, Yohann Morille, Sonia Zielinska, and   Ewelina Ortyl
physics.optics