<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0370-3908</journal-id>
<journal-title><![CDATA[Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. acad. colomb. cienc. exact. fis. nat.]]></abbrev-journal-title>
<issn>0370-3908</issn>
<publisher>
<publisher-name><![CDATA[Academia Colombiana de Ciencias Exactas, Físicas y Naturales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0370-39082018000200189</article-id>
<article-id pub-id-type="doi">10.18257/raccefyn.616</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Características del efecto Lau empleando redes de fase y de volumen fotorrefractivas]]></article-title>
<article-title xml:lang="en"><![CDATA[Features of the Lau effect by using a photorefractive volume phase grating]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Forte]]></surname>
<given-names><![CDATA[Gustavo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tebaldi]]></surname>
<given-names><![CDATA[Myrian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bolognini]]></surname>
<given-names><![CDATA[Nestor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A3"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,CONICET Centro de Investigaciones Ópticas ]]></institution>
<addr-line><![CDATA[La Plata ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de La Plata Facultad de Ciencias Exactas Departamento de Física]]></institution>
<addr-line><![CDATA[La Plata ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de La Plata Facultad de Ingeniería Departamento de Ciencias Básicas]]></institution>
<addr-line><![CDATA[La Plata ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>42</volume>
<numero>163</numero>
<fpage>189</fpage>
<lpage>193</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0370-39082018000200189&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0370-39082018000200189&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0370-39082018000200189&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este trabajo se estudia el efecto Lau empleando redes de fase de volumen generadas en un cristal fotorrefractivo tipo BSO. En nuestra propuesta la red de fase objeto se genera mediante la proyección de la imagen de una red iluminada incoherentemente en el volumen del cristal. Para esta red de fase fotorrefractiva se define un parámetro de modulación que depende del espesor del cristal. Se presentan resultados teóricos para diferentes distancias entre redes objeto-fuente que confirman nuestra propuesta.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This work analyzes the Lau effect produced by the volume phase grating generated in a photorefractive BSO crystal. In our proposal, the object phase grating is generated by projecting the image of an incoherently illuminated grating in the crystal volume. A modulation parameter that includes the effect of the crystal depth is introduced for this photorefractive phase grating. Theoretical results for different distances between object-source gratings that confirm our approach are presented.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Efecto Lau]]></kwd>
<kwd lng="es"><![CDATA[Red de volumen]]></kwd>
<kwd lng="es"><![CDATA[Cristales fotorrefractivos]]></kwd>
<kwd lng="en"><![CDATA[Lau effect]]></kwd>
<kwd lng="en"><![CDATA[Volume grating]]></kwd>
<kwd lng="en"><![CDATA[Photorefractive crystals]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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