<?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>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2012000400012</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Foto-transceptor para sistemas RoF y RoFSO usando un mezclador optoelectrónico basado en PHEMT]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arvizu]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reynoso-Hernández]]></surname>
<given-names><![CDATA[J.A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chávez]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[J. de D.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Centro de Investigación Científica y de Educacion Superior de Ensenada (CICESE)  ]]></institution>
<addr-line><![CDATA[Ensenada B.C.]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Autónoma de Baja California  ]]></institution>
<addr-line><![CDATA[ B.C.]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2012</year>
</pub-date>
<volume>58</volume>
<numero>4</numero>
<fpage>339</fpage>
<lpage>347</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2012000400012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2012000400012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2012000400012&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se describe la aplicación de mezcladores optoelectrónicos auto-oscilantes basados en el uso de transistores pseudomórficos de alta movilidad electrónica (PHEMT's) en sistemas de radio-sobre-fibra óptica (RoF) y radio sobre espacio libre óptico (RoFSO). En particular, reportamos el desarrollo de etapas de fotorrecepción (conversión de bajada) y conversión de subida para dichos sistemas a dos diferentes longitudes de onda: a 1550 nm empleando un mezclador basado en un PHEMT en tecnología de InP como dispositivo activo para detección y otro con un PHEMT en tecnología de GaAs a 850 nm. Se reportan los resultados de la caracterización electro-óptica del transistor tanto en oscuridad como para diferentes niveles de iluminación. Se muestran también resultados obtenidos en una aplicación típica de GSM sobre fibra óptica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[This paper deals with the application of self-oscillating optoelectronic mixers based on the use of a pseudomorphic high electron mobility transistor (PHEMT's) in radio over optical fiber (RoF) and radio over free space optics (RoFSO) systems. We describe the development of photoreception stages (down conversion) and up-conversion stages for such systems for two different wavelengths: 1550 nm using a mixer based on a PHEMT on InP substrate as active device for detection and another one with a PHEMT on GaAs substrate at 850 nm. We report the characterization results both for not illumination and illumination conditions. We also describe the results obtained on a typical application of GSM over optical fibers.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[RoF]]></kwd>
<kwd lng="es"><![CDATA[RoFSO]]></kwd>
<kwd lng="es"><![CDATA[PHEMT]]></kwd>
<kwd lng="es"><![CDATA[GSM]]></kwd>
<kwd lng="en"><![CDATA[RoF]]></kwd>
<kwd lng="en"><![CDATA[RoFSO]]></kwd>
<kwd lng="en"><![CDATA[PHEMT]]></kwd>
<kwd lng="en"><![CDATA[GSM]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Instrumentaci&oacute;n</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="4"><b>Foto&#45;transceptor para sistemas RoF y RoFSO usando un mezclador optoelectr&oacute;nico basado en PHEMT</b></font></p>  	    <p align="center"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="2"><b>A. Arvizu <sup>a</sup>, J.A. Reynoso&#45;Hern&aacute;ndez <sup>a</sup>, M.A. Ch&aacute;vez <sup>a</sup>, y J. de D. S&aacute;nchez <sup>b</sup></b></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><i><sup>a</sup> Centro de Investigaci&oacute;n Cient&iacute;fica y de Educacion Superior de Ensenada (CICESE). Carret. Ens.&#45;Tij.3918, Zona Playitas, Ensenada, B.C., 22860, M&eacute;xico,</i> e&#45;mail: <a href="mailto:arvizu@cicese.mx">arvizu@cicese.mx</a></font></p>  	    <p align="justify"><font face="verdana" size="2"><i><sup>b</sup> Universidad Aut&oacute;noma de Baja California, KM 103 Carr. Tij.&#45;Ens., B.C. 22860, M&eacute;xico,</i> e&#45;mail: <a href="mailto:jddios@uabc.edu.mx">jddios@uabc.edu.mx</a></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Recibido el 25 de noviembre de 2011;    <br> 	aceptado el 16 de mayo de 2012</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>  	    <p align="justify"><font face="verdana" size="2">Se describe la aplicaci&oacute;n de mezcladores optoelectr&oacute;nicos auto&#45;oscilantes basados en el uso de transistores pseudom&oacute;rficos de alta movilidad electr&oacute;nica (PHEMT's) en sistemas de radio&#45;sobre&#45;fibra &oacute;ptica (RoF) y radio sobre espacio libre &oacute;ptico (RoFSO). En particular, reportamos el desarrollo de etapas de fotorrecepci&oacute;n (conversi&oacute;n de bajada) y conversi&oacute;n de subida para dichos sistemas a dos diferentes longitudes de onda: a 1550 nm empleando un mezclador basado en un PHEMT en tecnolog&iacute;a de InP como dispositivo activo para detecci&oacute;n y otro con un PHEMT en tecnolog&iacute;a de GaAs a 850 nm. Se reportan los resultados de la caracterizaci&oacute;n electro&#45;&oacute;ptica del transistor tanto en oscuridad como para diferentes niveles de iluminaci&oacute;n. Se muestran tambi&eacute;n resultados obtenidos en una aplicaci&oacute;n t&iacute;pica de GSM sobre fibra &oacute;ptica.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Descriptores:</b> RoF; RoFSO; PHEMT; GSM.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>  	    <p align="justify"><font face="verdana" size="2">This paper deals with the application of self&#45;oscillating optoelectronic mixers based on the use of a pseudomorphic high electron mobility transistor (PHEMT's) in radio over optical fiber (RoF) and radio over free space optics (RoFSO) systems. We describe the development of photoreception stages (down conversion) and up&#45;conversion stages for such systems for two different wavelengths: 1550 nm using a mixer based on a PHEMT on InP substrate as active device for detection and another one with a PHEMT on GaAs substrate at 850 nm. We report the characterization results both for not illumination and illumination conditions. We also describe the results obtained on a typical application of GSM over optical fibers.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> RoF; RoFSO; PHEMT; GSM.</font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2">PACS: 07.57.&#45;c; 85.60.Bt; 85.60.Dw</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v58n4/v58n4a12.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Referencias</b></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">1. P. Tien Dat, A. Bekkali, K. Kazaura, K. Wakamori, T. Suzuki, M. 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