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Simple turbulence measurements with azopolymer thin films

Abstract :

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.

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https://hal.univ-angers.fr/hal-03344734
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Soumis le : mercredi 15 septembre 2021 - 11:09:36
Dernière modification le : jeudi 9 décembre 2021 - 15:46:06

Identifiants

  • HAL Id : hal-03344734, version 1
  • OKINA : ua3185

Citation

Régis Barille, Dario Perez, Yohann Morille, Sonia Zielinska, Ewelina Ortyl. Simple turbulence measurements with azopolymer thin films. Optics Letters, Optical Society of America - OSA Publishing, 2013, 38 (7), pp.1128-1130. ⟨hal-03344734⟩

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