Simple turbulence measurements with azopolymer thin films

Regis Barillé, Darío G. Pérez, Yohann Morille, Sonia Zielińska, Ewelina Ortyl

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


A simple method to measure the influence on the laser beam propagation by a turbid medium is proposed. This measurement is based on the inscription of a surface relief grating (SRG) on an azopolymer thin film. The grating obtained with a single laser beam after propagation into a turbulent medium is perturbed and directly analyzed by a CCD camera through its diffraction pattern. Later, by scanning the surface pattern with an atomic force microscope, the inscribed SRG is analyzed with the Radon transform. This method has the advantage of using a single beam to remotely inscribe a grating detecting perturbations during the beam path. A method to evaluate the refractive index constant structure is developed.

Original languageEnglish
Pages (from-to)1128-1130
Number of pages3
JournalOptics Letters
Issue number7
StatePublished - 1 Apr 2013


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