<?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>1405-7743</journal-id>
<journal-title><![CDATA[Ingeniería, investigación y tecnología]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. invest. y tecnol.]]></abbrev-journal-title>
<issn>1405-7743</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Ingeniería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-77432025000100007</article-id>
<article-id pub-id-type="doi">10.22201/fi.25940732e.2025.26.1.007</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Design and fabrication of photonic devices and a microfluidic channel with a femtosecond laser]]></article-title>
<article-title xml:lang="es"><![CDATA[Diseño y fabricación de dispositivos fotónicos y un canal microfluídico con láser de femtosegundos]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez-Ávila]]></surname>
<given-names><![CDATA[Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vázquez-García]]></surname>
<given-names><![CDATA[Gloria V.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soto-Bernal]]></surname>
<given-names><![CDATA[Juan José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de Aguascalientes Departamento de Ingeniería Electrónica ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Investigaciones en Óptica A. C. Laboratorio de Óptica Integrada ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Tecnológico de Aguascalientes Departamento de Ingeniería Electrónica ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2025</year>
</pub-date>
<volume>26</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-77432025000100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-77432025000100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-77432025000100007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This article presents the modeling and fabrication of photonic devices such as a Mach-Zehnder waveguide interferometer (MZWI) and a 1 × 4 optical power splitter (OPS) with a microfluidic channel. The photonic structures were designed using CAD software and BeamPROPTM to have an s-shaped waveguide bend geometry and a total length of 8000 &#956;m, and the devices were then integrated with a 6000 &#956;m microfluidic channel to form configurations based on conical spirals and helices with femtosecond laser radiation. The entire writing process was performed in a single step with a 20X microscope objective to achieve greater accuracy in the manufacturing process. A chemical etching step was performed using the shape-controlled with femtosecond laser irradiation followed by chemical etching (SC-FLICE) technique, forming a uniform cross-section in the central part of the microfluidic channel. The energy doses and translation speeds of the system were varied, resulting in a longer microfluidic channel. In this research, we introduce an optofluidic system which integrates the principles of optics and microfluidics, is suitable for biosensing applications. The compatibility of this system with biosensing applications paves the way for significant progress in various sectors, including medical diagnostics, environmental surveillance, and biochemical studies. The originality and value of this work lie in its unique design and potential for broad application. In the present work, it was demonstrated that using ultrafast laser writing, we can fabricate photonic devices and a consistent microfluidic channel on a single step.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Este artículo presenta el modelado y fabricación de dispositivos fotónicos como el interferómetro de guías de onda Mach-Zehnder (MZWI, por sus siglas en inglés) y un divisor de potencia óptica de guías de onda (OPS, por sus siglas en inglés) de 1 × 4 con un canal microfluídico. Las estructuras fotónicas se diseñaron utilizando software CAD y BeamPROPTM para tener una geometría de curvatura de guía de onda en forma de &#8220;s&#8221; y una longitud total de 8000 &#956;m, luego los dispositivos se integraron con un canal microfluídico de 6000 &#956;m para formar configuraciones basadas en espirales y hélices cónicas mediante radiación láser de femtosegundos. Todo el proceso de escritura se realizó en un solo paso con un objetivo de microscopio de 20X para lograr una mayor precisión en el proceso de fabricación. Se realizó un paso de grabado químico utilizando la técnica de forma controlada mediante irradiación con láser de femtosegundos seguido de grabado químico (SC-FLICE, por sus siglas en inglés), formando una sección transversal uniforme en la parte central del canal microfluídico. Se variaron las dosis de energía y las velocidades de traslación del sistema, lo que resultó en un canal microfluídico más largo. En esta investigación, presentamos un sistema optofluídico que integra los principios de la óptica y la microfluídica que es adecuado para aplicaciones de biodetección. La compatibilidad de este sistema con aplicaciones de biosensores allana el camino para avances significativos en diversos sectores, incluidos el diagnóstico médico, la vigilancia ambiental y los estudios bioquímicos. La originalidad y el valor de este trabajo residen en su diseño único y su potencial para una amplia aplicación. En el presente trabajo se demostró que, utilizando la escritura láser ultrarrápida, podemos fabricar dispositivos fotónicos y un canal microfluídico consistente en un solo paso.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Photonic devices]]></kwd>
<kwd lng="en"><![CDATA[integrated optics]]></kwd>
<kwd lng="en"><![CDATA[BeamPROPTM]]></kwd>
<kwd lng="en"><![CDATA[microfluidic channel]]></kwd>
<kwd lng="en"><![CDATA[femtosecond laser]]></kwd>
<kwd lng="en"><![CDATA[chemical etching]]></kwd>
<kwd lng="en"><![CDATA[micromachining]]></kwd>
<kwd lng="es"><![CDATA[Dispositivos fotónicos]]></kwd>
<kwd lng="es"><![CDATA[óptica integrada]]></kwd>
<kwd lng="es"><![CDATA[BeamPROPTM]]></kwd>
<kwd lng="es"><![CDATA[canal microfluídico]]></kwd>
<kwd lng="es"><![CDATA[láser de femtosegundos]]></kwd>
<kwd lng="es"><![CDATA[grabado químico]]></kwd>
<kwd lng="es"><![CDATA[micromaquinado]]></kwd>
</kwd-group>
</article-meta>
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