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

doi:10.1016/j.optcom.2004.05.049

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

Research output: Contribution to scientific journal › Article in an indexed scientific journal › peer-review

6 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	287-296
Number of pages	10
Journal	Optics Communications
Volume	239
Issue number	4-6
DOIs	https://doi.org/10.1016/j.optcom.2004.05.049
State	Published - 15 Sep 2004

Bibliographical note

Funding Information:
A. Salazar, J. Garzón, F. Pérez and H. Lorduy, acknowledge the financial support of the Universidad Pontificia Bolivariana and the Instituto de Fı́sica of the Universidad de Antioquia, Medellı́n, Colombia. The authors thank Profs. Rodrigo Henao and Guillermo Pineda of the Instituto de Fı́sica, Universidad de Antioquia, for their collaboration throughout this work.

Keywords

Photorefractive
Wavelet transform
Wavelet-matched filtering

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10.1016/j.optcom.2004.05.049

Cite this

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title = "Optical wavelet correlator by four-wave mixing via reflection holograms in a bso crystal",

abstract = "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.",

keywords = "Photorefractive, Wavelet transform, Wavelet-matched filtering",

author = "A. Salazar and R. G{\'o}ez and D. Sierra and J. Garz{\'o}n and F. P{\'e}rez and H. Lorduy",

note = "Funding Information: A. Salazar, J. Garz{\'o}n, F. P{\'e}rez and H. Lorduy, acknowledge the financial support of the Universidad Pontificia Bolivariana and the Instituto de F{\'ı}sica of the Universidad de Antioquia, Medell{\'ı}n, Colombia. The authors thank Profs. Rodrigo Henao and Guillermo Pineda of the Instituto de F{\'ı}sica, Universidad de Antioquia, for their collaboration throughout this work.",

year = "2004",

month = sep,

day = "15",

doi = "10.1016/j.optcom.2004.05.049",

language = "Ingl{\'e}s",

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TY - JOUR

T1 - Optical wavelet correlator by four-wave mixing via reflection holograms in a bso crystal

AU - Salazar, A.

AU - Góez, R.

AU - Sierra, D.

AU - Garzón, J.

AU - Pérez, F.

AU - Lorduy, H.

N1 - Funding Information: A. Salazar, J. Garzón, F. Pérez and H. Lorduy, acknowledge the financial support of the Universidad Pontificia Bolivariana and the Instituto de Fı́sica of the Universidad de Antioquia, Medellı́n, Colombia. The authors thank Profs. Rodrigo Henao and Guillermo Pineda of the Instituto de Fı́sica, Universidad de Antioquia, for their collaboration throughout this work.

PY - 2004/9/15

Y1 - 2004/9/15

N2 - 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.

AB - 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.

KW - Photorefractive

KW - Wavelet transform

KW - Wavelet-matched filtering

UR - https://www.scopus.com/pages/publications/4344685299

U2 - 10.1016/j.optcom.2004.05.049

DO - 10.1016/j.optcom.2004.05.049

M3 - Artículo en revista científica indexada

AN - SCOPUS:4344685299

SN - 0030-4018

VL - 239

SP - 287

EP - 296

JO - Optics Communications

JF - Optics Communications

IS - 4-6

ER -

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

Abstract

Bibliographical note

Keywords

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