Recent Submissions

  • Multipactor breakdown analysis of Ku-band meandered low-pass filter 

    Sami, Abdul Upna; Teberio Berdún, Fernando Upna Orcid; Arnedo Gil, Israel; Martín Iglesias,  Petronilo; Lopetegui Beregaña, José María; Gómez Laso, Miguel Ángel Upna Orcid; Arregui Padilla, Iván Upna Orcid (2022)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work, a very compact rectangular waveguide low-pass filter with meandered topology based on commensurate lines for Ku-band satellite applications is analysed for high-power handling capabilities. The device consists ...
  • Distributed humidity sensor for moisture-front monitoring in soils 

    Leandro González, Daniel Upna Orcid; Delgado Zabala, Oihane; López Rodríguez, José Javier Upna Orcid; Bravo Acha, Mikel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (Optica, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this contribution, high spatial resolution distributed humidity sensing was demonstrated for moisture-front monitoring in soils by using polyimide coated optical fiber.
  • Traffic monitoring based on FBG sensor arrays in asphalt structures 

    Bravo Acha, Mikel Upna Orcid; Leandro González, Daniel Upna Orcid; Bravo Acha, A.; Bravo Navas, M.; Mitxelena, J. R.; Martínez Mazo, J. J.; Camarero, E.; López-Amo Sáinz, Manuel Upna Orcid (Optica, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    We evaluate the capabilities of optical fiber sensors to measure traffic flow, speed, weight estimation and pavement degradation. The proper operation of the system has been proved 3.5 years after the installation in a ...
  • WDM and TDM interrogation by sequentially pulsing direct modulated DFBs 

    Pérez-González, A.; Bravo Acha, Mikel Upna Orcid; Leandro González, Daniel Upna Orcid; Pérez Herrera, Rosa Ana Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (Optica, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    A new versatile and cost-effective interrogation system by pulsing direct modulated (DM) DFB laser diodes is proposed. 1 pm wavelength resolution and 600 m sensor spacing is demonstrated by sequentially pulsing a DM DFB.
  • In-field torsion measurements on solar trackers using fiber optic sensors 

    Leandro González, Daniel Upna Orcid; Bravo Acha, Mikel Upna Orcid; Júdez Colorado, Aitor Upna; Mariñelarena Ollacarizqueta, Jon Upna Orcid; Falcone Lanas, Francisco Upna Orcid; Loayssa Lara, Alayn; López-Amo Sáinz, Manuel Upna Orcid; Jiménez, S.; Achaerandio, Álvaro (Optica, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In-field torsion measurements on solar trackers using fiber Bragg gratings are presented. 45 FBG sensors have been deployed in an operational solar energy plant to study the mechanical response of the structure to wind.
  • Compact optical fiber lasers and optical fiber sensors assisted by femtosecond laser inscription of plane-by-plane FBGs 

    Roldán Varona, Pablo; Pallarés-Aldeiturriaga, D.; Rodríguez Cobo, Luis; Pérez Herrera, Rosa Ana Upna Orcid; Bravo Acha, Mikel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid; López Higuera, José Miguel (Optica, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Development of a high temperature sensor based on optical fiber l aser generated from a cavity of reduced dimensions (43 mm) in Er-doped fiber. The mirror FBGs have been inscribed with femtosecond laser using the slit beam ...
  • Enhanced optical fiber lasers and optical fiber sensors assisted by micro-drilled optical fibers 

    Pérez Herrera, Rosa Ana Upna Orcid; Bravo Acha, Mikel Upna Orcid; Roldán Varona, Pablo; Leandro González, Daniel Upna Orcid; Rodríguez Cobo, Luis; López Higuera, José Miguel; López-Amo Sáinz, Manuel Upna Orcid (Optica, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Enhanced OFS assisted by micro-drilled optical fibers acting as mirrors are demonstrated. Strain sensitivity improved more than one order of magnitude in comparison with FBG sensors using a 50 μm-waist micro-drilled taper ...
  • Labescape and breakout: gamification for photonics students 

    Pérez Herrera, Rosa Ana Upna Orcid; Tainta Ausejo, Santiago Upna Orcid; Elosúa Aguado, César Upna Orcid (IATED, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Nowadays, the idea of using game mechanisms in non-gaming environments has become of great interest in different fields such as education or training. Not only for primary school but also in higher formal education, ...
  • Analysis of inter-train wireless connectivity to enable context aware rail applications 

    Picallo Guembe, Imanol Upna Orcid; López Iturri, Peio Upna Orcid; Celaya Echarri, Mikel; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Astrain Escola, José Javier Upna Orcid; Falcone Lanas, Francisco Upna Orcid (Springer, 2021)   Contribución a congreso / Biltzarrerako ekarpena
    Train systems are fundamental players within multi-modal transit systems, providing efficient transportation means for passengers and goods. In the framework of Smart Cities and Smart Regions, providing context aware ...
  • Gender analysis on the Ph.D. theses defended in Spain in the field of Optics and Photonics 

    Pérez Herrera, Rosa Ana Upna Orcid; Baralida Tomás, María; Santamaría, Beatriz; Heras, Alba de las; Benedi García, Clara; Gómez Varela, Ana Isabel; Delgado Pinar, Martina; González Fernández, Verónica (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Unconscious perceptions and decisions are influenced by gender bias. In this work, we provide an exhaustive data analysis of the Ph.D. theses defended in the field of optics and photonics in Spain by filtering key descriptors ...
  • Applied method to model the thermal runaway of lithium-ion batteries 

    Lalinde Sainz, Iñaki; Berrueta Irigoyen, Alberto Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The thermal runaway (TR) is one of the most dangerous phenomena related to lithium-ion batteries. For this reason, there are different proposals in the literature for its modelling. Most of these proposed models take into ...
  • Zero-loss switching in DC-DC series resonant converters under discontinuous conduction mode 

    Elizondo Martínez, David Upna Orcid; Barrios Rípodas, Ernesto Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Many thriving applications where isolation is required, such as traction and EV fast charging, implement solid-state transformers (SST). Half-cycle discontinuous-conduction-mode series resonant converters (HC-DCM-SRC) are ...
  • Incremental capacity analysis of lithium-ion second-life batteries from electric vehicles under cycling ageing 

    Braco Sola, Elisa Upna; San Martín Biurrun, Idoia Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Nowadays, the reuse of batteries from electric vehicles is considered a promising solution to benefit from their remaining energy and extend their lifespan. Yet, the economic viability of these second-life batteries is ...
  • Analysis of a CIS based PV generator versus a multicrystalline generator under outdoor long-term exposure 

    Parra Laita, Íñigo de la Upna Orcid; Guerra Menjívar, Moisés Roberto; Marcos Álvarez, Javier Upna Orcid; García Solano, Miguel Upna Orcid; Marroyo Palomo, Luis Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The worldwide growth of the PV market has been almost exponential during the last years. Together with conventional crystalline (c-Si) PV modules, “new” commercially available PV technologies such as copper indium ...
  • DC capacitance reduction in photovoltaic inverters based on PV voltage feed-forward compensation 

    Urtasun Erburu, Andoni Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Marroyo Palomo, Luis Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In the case of photovoltaic (PV) inverters, an adequate input voltage regulation is fundamental to maximize or limit the power. When employing the traditional control, the input capacitance requires to be oversized in order ...
  • Dynamic modeling and simulation of a pressurized alkaline water electrolyzer: a multiphysics approach 

    Iribarren Zabalegui, Álvaro Upna; Barrios Rípodas, Ernesto Upna Orcid; Ibaiondo, Harkaitz; Sánchez-Ruiz, Alain; Arza, Joseba; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this paper a dynamic model for the simulation of pressurized alkaline water electrolyzers is presented. The model has been developed following a multiphysics approach, integrating electrochemical, thermodynamic, heat ...
  • Learning CAN bus communication with a remote laboratory 

    Del Villar, Ignacio Upna Orcid; Rodriguez-Gil, Luis; Orduña, Pablo (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena
    CAN bus is a very important communications protocol. Its usage is extended to many applications and it is key to know some fundamentals in an introductory course to industrial communications. A collaborative experience ...
  • New design alternatives for a hybrid photovoltaic and doubly-fed induction wind plant to augment grid penetration of renewable energy 

    Goñi, Naiara; Sacristán Sillero, Javier; Berrueta Irigoyen, Alberto Upna Orcid; Rodríguez Rabadan, José Luis; Ursúa Rubio, Alfredo Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Reducing carbon emissions is essential to stop climate change. The grid-share of renewable generation plants is increasing, being wind and photovoltaic plants the most common ones, whereas conventional plants are the ...
  • Enhancement of the sensitivity of a volatile organic compounds MOF sensor by means of its structure 

    López Torres, Diego Upna Orcid; López Aldaba, Aitor Upna; Elosúa Aguado, César Upna Orcid; Auguste, Jean L.; Jamier, Rapahel; Roy, Philippe; López-Amo Sáinz, Manuel Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (MDPI, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this paper, we experimentally compare several core structures of Microstructured Optical Fibers (MOFs) for low-finesse Fabry-Pérot (FP) sensors. These sensors are designed for Volatile Organic Compounds (VOCs) measurements. ...
  • Optimized DFIG electrical design under voltage sags 

    Urtasun Salinas, Ibai; Larrea León, Pablo; López Taberna, Jesús Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    This paper addresses the dual problem (electrical-mechanical) of DFIG-based wind turbines under voltage sags and proposes an optimized solution that, starting from a design aimed to mitigate the mechanical loads in the ...

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