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  • The effectiveness of translation, image-based and video-based methologies for receptive and productive vocabulary acquisition 

    Navarro García, David (2018)    OpenAccess
    The aim of this study is to analyse and compare three different methodologies (glossed L1 translation lists, image-based and video-based) for vocabulary learning taking into account the two stages of vocabulary acquisition: ...
  • La estadística y la probabilidad en el alumnado de 1º de ESO 

    López Cueto, Leyre (2018)    OpenAccess
    Este Trabajo Fin de Máster tiene como objetivo analizar el estudio de la estadística y la probabilidad en el alumnado de 1º de ESO. El trabajo se estructura en dos partes. En la primera parte se realiza un estudio ...
  • CDH22 hypermethylation is an independent prognostic biomarker in breast cancer 

    Martín, Esperanza; Mendaza Lainez, Saioa; Ulazia Garmendia, Ane; Monreal Santesteban, Iñaki; Córdoba Iturriagagoitia, Alicia; Vicente García, Francisco; Blanco Luquin, Idoia; Cruz, Susana de la; Aramendia, Ana; Guerrero, David (BioMed Central, 2017)   Artículo / Artikulua  OpenAccess
    Background: Cadherin-like protein 22 (CDH22) is a transmembrane glycoprotein involved in cell-cell adhesion and metastasis. Its role in cancer is controversial because it has been described as being upregulated in ...
  • Terahertz wave transmission in flexible polystyrene-lined hollow metallic waveguides for the 2.5-5 THz band 

    Navarro Cía, Miguel Upna; Vitiello, Miriam S.; Bledt, Carlos M.; Melzer, Jeffrey E.; Harrington, James A.; Mitrofanov, Oleg (Optical Society of America, 2013)   Artículo / Artikulua  OpenAccess
    A low-loss and low-dispersive optical-fiber-like hybrid HE11 mode is developed within a wide band in metallic hollow waveguides if their inner walls are coated with a thin dielectric layer. We investigate terahertz (THz) ...
  • Tunable electro-optic wavelength filter based on lossy-guided mode resonances 

    Corres Sanz, Jesús María Upna; Ascorbe Muruzabal, Joaquín Upna; Arregui San Martín, Francisco Javier Upna; Matías Maestro, Ignacio Upna (Optical Society of America, 2013)   Artículo / Artikulua  OpenAccess
    In this work an optical fiber tunable filter based on lossy guided-mode resonances (LGMR) is proposed. It consists of a multilayer structure deposited onto the surface of a plastic cladding removed multimode fiber. The ...
  • High sensitive refractometers based on lossy mode resonances (LMRs) supported by ITO coated D-shaped optical fibers 

    Zubiate Orzanco, Pablo Upna; Ruiz Zamarreño, Carlos Upna; Del Villar, Ignacio Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna (Optical Society of America, 2015)   Artículo / Artikulua  OpenAccess
    Tin doped indium oxide (ITO) coatings fabricated onto D-shaped optical fibers are presented as the supporting medium for Lossy Mode Resonances (LMRs) generation. The characteristic geometry of ITO-coated D-shaped optical ...
  • High resolution polarization-independent highbirefringence fiber loop mirror sensor 

    Leandro González, Daniel Upna; Bravo Acha, Mikel Upna; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2015)   Artículo / Artikulua  OpenAccess
    In this work, two all polarization-maintaining (PM) highbirefringence (Hi-Bi) fiber loop mirrors (FLM) which are immune to external polarization perturbations are validated both theoretically and experimentally. Simplified ...
  • Single-longitudinal mode laser structure based on a very narrow filtering technique 

    Rodríguez Cobo, L.; Quintela, M. A.; Rota Rodrigo, Sergio Upna; López-Amo Sáinz, Manuel Upna; López Higuera, José Miguel (Optical Society of America, 2013)   Artículo / Artikulua  OpenAccess
    A narrow filtering technique based on the spectral overlapping of two uniform FBGs and applied to obtain a Single Longitudinal Mode (SLM) laser is proposed and demonstrated in this work. The two FBGs are spectrally detuned ...
  • Ultra-long (290 km) remote interrogation sensor network based on a random distributed feedback fiber laser 

    Miguel Soto, Verónica de; Leandro González, Daniel; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2018)   Artículo / Artikulua  OpenAccess
    In this work, an interferometric sensor has been interrogated 290 km away from the monitoring station, reaching the longest distance in fiber optic sensing up to date. This has been attained by employing a double-pumped ...
  • Multiplexing of six micro-displacement suspended-core Sagnac interferometer sensors with a Raman-Erbium fiber laser 

    Bravo Acha, Mikel; Fernández Vallejo, Montserrat; Echapare Zabaleta, Mikel; López-Amo Sáinz, Manuel Upna; Kobelke, J.; Schuster, K. (Optical Society of America, 2013)   Artículo / Artikulua  OpenAccess
    This work experimentally demonstrates a long-range optical fiber sensing network for the multiplexing of fiber sensors based on photonic crystal fibers. Specifically, six photonic crystal fiber sensors which are based on ...
  • Effects of pump pulse extinction ratio in Brillouin optical time-domain analysis sensors 

    Iribas Pardo, Haritz; Mariñelarena Ollacarizqueta, Jon Upna; Feng, Cheng; Urricelqui Polvorinos, Javier; Schneider, Thomas; Loayssa Lara, Alayn Upna (Optical Society of America, 2017)   Artículo / Artikulua  OpenAccess
    We report on two previously unknown non-local effects that have been found to impair Brillouin optical time-domain analysis (BOTDA) sensors that deploy limited extinction ratio (ER) pump pulses. The first one originates ...
  • Multiband one-way polarization conversion in complementary split-ring resonator based structures by combining chirality and tunneling 

    Serebryannikov, Andriy; Beruete Díaz, Miguel Upna; Mutlu, Mehmet; Ozbay, E. (Optical Society of America, 2015)   Artículo / Artikulua  OpenAccess
    Multiband one-way polarization conversion and strong asymmetry in transmission inspired by it are demonstrated in ultrathin sandwiched structures that comprise two twisted aperture-type arrays of complementary split-ring ...
  • Highly-efficient fully resonant vertical couplers for InP active-passive monolithic integration using vertically phase matched waveguides 

    García López, Óscar; Lasaosa Medarde, Daniel; López-Amo Sáinz, Manuel Upna; Galarza Galarza, Marko (Optical Society of America, 2013)   Artículo / Artikulua  OpenAccess
    A new active-passive monolithic integration approach for photonic components based on vertical evanescent coupling is presented. Two vertically stacked waveguides are used in order to provide full resonant power transfer ...
  • Vertically coupled microring resonators using one epitaxial growth step and single-side lithography 

    García López, Óscar; |Thourhout, Dries Van; Lasaosa Medarde, Daniel; López-Amo Sáinz, Manuel Upna; Baets, Roel; Galarza Galarza, Marko (Optical Society of America, 2015)   Artículo / Artikulua  OpenAccess
    A new concept for the fabrication of integrated microring resonators, requiring only one single epitaxial growth and two single-side lithographic steps, is proposed in what is the simplest fabrication scheme for vertical ...
  • Terahertz epsilon-near-zero graded-index lens 

    Torres Landívar, Víctor Upna; Pacheco-Peña, Víctor Upna; Rodríguez Ulibarri, Pablo Upna; Navarro Cía, Miguel Upna; Beruete Díaz, Miguel Upna; Sorolla Ayza, Mario Upna; Engheta, Nader (Optical Society of America, 2013)   Artículo / Artikulua  OpenAccess
    An epsilon-near-zero graded-index converging lens with planar faces is proposed and analyzed. Each perfectly-electric conducting (PEC) waveguide comprising the lens operates slightly above its cut-off frequency and has ...
  • Suspended-core fiber Sagnac combined dual-random mirror Raman fiber laser 

    Rodrigues Pinto, Ana Margarida Upna; Bravo Acha, Mikel Upna; Fernández Vallejo, Montserrat Upna; López-Amo Sáinz, Manuel Upna; Kobelke, J.; Schuster, K. (Optical Society of America, 2011)   Artículo / Artikulua  OpenAccess
    In the present work, a multiwavelength fiber laser based in the combination of a double-random mirror and a suspended-core Sagnac interferometer is presented. The double-random mirror acts by itself as a random laser, ...
  • Long-range hybrid network with point and distributed Brillouin sensors using Raman amplification 

    Zornoza Indart, Ander; Pérez Herrera, Rosa Ana Upna; Elosúa Aguado, César Upna; Díaz Lucas, Silvia Upna; Bariáin Aisa, Cándido Upna; Loayssa Lara, Alayn Upna; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2010)   Artículo / Artikulua  OpenAccess
    We propose a novel concept for hybrid networks that combine point and distributed Brillouin sensors in a cost-effective architecture that also deploys remote distributed Raman amplification to extend the sensing range. A ...
  • Millimeter-wave phase resonances in compound reflection gratings with subwavelength grooves 

    Beruete Díaz, Miguel Upna; Navarro Cía, Miguel Upna; Skigin, Diana C.; Sorolla Ayza, Mario Upna (Optical Society of America, 2010)   Artículo / Artikulua  OpenAccess
    Experimental evidence of phase resonances in a dual-period reflection structure comprising three subwavelength grooves in each period is provided in the millimeter-wave regime. We have analyzed and measured the response ...
  • Broadband spoof plasmons and subwavelength electromagnetic energy confinement on ultrathin metafilms 

    Navarro Cía, Miguel Upna; Beruete Díaz, Miguel Upna; Agrafiotis, Spyros; Falcone Lanas, Francisco Javier Upna; Sorolla Ayza, Mario Upna; Maier, Stefan A. (Optical Society of America, 2009)   Artículo / Artikulua  OpenAccess
    A complementary split ring resonator (CSRR)-based metallic layer is proposed as a route to mimic surface plasmon polaritons. A numerical analysis of the textured surface is carried out and compared to previous prominent ...
  • Swept optical single sideband modulation for spectral measurement applications using stimulated Brillouin scattering 

    Sagüés García, Mikel Upna; Loayssa Lara, Alayn Upna (Optical Society of America, 2010)   Artículo / Artikulua  OpenAccess
    We propose a technique for the generation of broadband optical single sideband modulated signals. The technique is based on optically processing an optical double sideband signal using stimulated Brillouin scattering effect. ...

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