Digital controller applied to phase control in photorefractive crystals

G. Héctor Lorduy, J. Albeiro Valencia

    Resultado de la investigación: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

    Resumen

    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.

    Idioma originalInglés
    Título de la publicación alojada8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications
    DOI
    EstadoPublicada - 2013
    Evento8th Iberoamerican Optics Meeting, RIAO 2013 and 11th Latin American Meeting on Optics, Lasers, and Applications, OPTILAS 2013 - Porto, Portugal
    Duración: 22 jul. 201326 jul. 2013

    Serie de la publicación

    NombreProceedings of SPIE - The International Society for Optical Engineering
    Volumen8785
    ISSN (versión impresa)0277-786X
    ISSN (versión digital)1996-756X

    Conferencia

    Conferencia8th Iberoamerican Optics Meeting, RIAO 2013 and 11th Latin American Meeting on Optics, Lasers, and Applications, OPTILAS 2013
    País/TerritorioPortugal
    CiudadPorto
    Período22/07/1326/07/13

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