@inproceedings{bdd23dc981d44480b1aeb1082171a184,
title = "Digital controller applied to phase control in photorefractive crystals",
abstract = "The photorefractive crystals are electro-optic materials and photoconductors, have the property that the refractive index changes locally when is illuminated by a no uniform spatial light distribution. The non-uniformity is produced by the interference of two coherent beams, one known as signal beam and the other one as reference beam. The intensity pattern produces inside the sample a local redistribution of the electric field inducing a change in the refraction index by a linear electro-optic effect known as index grating, all the incidents beams on the grating are diffracted. The purpose of this study is evaluate the use of a digital controller for the improving of the system stability. It is then shown the dynamic simulation of the experimental scheme for the self-stabilized system using a PI controller tuned as an internal model controller IMC.",
keywords = "Digital controller, Index grating, Photorefractive crystals, Self-stabilized holograms",
author = "Lorduy, \{G. H{\'e}ctor\} and Valencia, \{J. Albeiro\}",
year = "2013",
doi = "10.1117/12.2022206",
language = "Ingl{\'e}s",
isbn = "9780819496010",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications",
note = "8th Iberoamerican Optics Meeting, RIAO 2013 and 11th Latin American Meeting on Optics, Lasers, and Applications, OPTILAS 2013 ; Conference date: 22-07-2013 Through 26-07-2013",
}