Optical wavelet correlator by four-wave mixing via reflection holograms in a bso crystal

A. Salazar, R. Góez, D. Sierra, J. Garzón, F. Pérez, H. Lorduy

    Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

    5 Citas (Scopus)

    Resumen

    A real-time wavelet-matched optical correlator is implemented by using four-wave mixing via reflection gratings. Photorefractive crystals BSO with different thickness are used in the experimental set-up. The square modulus of the Fourier transform of the Mexican-hat wavelet has been utilized to implement the wavelet filtering. The edge enhancement property of the wavelet transform is experimentally demonstrated in this scheme. Several non-binary filters with different dilation factors have been considered for different crystal thicknesses. When proper dilation factors are used, a higher robustness to the noise introduced by the finite crystal depth is obtained. The convenience to use a non-binary filter is experimentally demonstrated.

    Idioma originalInglés
    Páginas (desde-hasta)287-296
    Número de páginas10
    PublicaciónOptics Communications
    Volumen239
    N.º4-6
    DOI
    EstadoPublicada - 15 sept. 2004

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