Analysis of reflection speckle holograms in a BSO crystal

Ángel Salazar, Héctor Lorduy, Myrian Tebaldi, Nestor Bolognini

    Research output: Contribution to journalArticle in an indexed scientific journalpeer-review

    7 Scopus citations

    Abstract

    A theoretical and experimental study of speckle registering in photorefractive BSO crystals through reflection hologram geometry is implemented. The three-dimensional speckle nature is considered in the diffraction efficiency calculations. The interference process produces index-of-refraction gratings in the speckle volume via the photorefractive effect. It is demonstrated that the coupled-wave theory for reflection geometry allows explaining the diffraction efficiency behavior when the interaction length is properly taken into account. It means that the speckle depth is related with the interaction length. The speckle depth can be controlled by the imaging system pupil aperture diameter. Under this condition, the influence of the speckle depth on the diffraction efficiency is analyzed. An agreement between the numerical model based on the coupled-wave theory and the experimental results is obtained.

    Original languageEnglish
    Pages (from-to)157-163
    Number of pages7
    JournalOptics Communications
    Volume262
    Issue number2
    DOIs
    StatePublished - 15 Jun 2006

    Bibliographical note

    Funding Information:
    A. Salazar and H. Lorduy acknowledge the financial support of the Universidad Pontificia Bolivariana, Medellı´n-Colombia, its Centro de Ciencia Básica and the Centro Integrado para el Desarrollo de la Investigación, CIDI, throughout the research 640-11/04-27.

    Keywords

    • 42.30.Ms
    • 42.40.Ht
    • 42.40.Lx
    • Photorefractive
    • Speckle
    • Two-wave mixing

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