Recent Submissions

  • Investigation of direct contact membrane distillation coupling with a concentrated photovoltaic solar system 

    Krnac, Andrew; Araiz Vega, Miguel Upna; Rana, Sohel; Velardo, Jason; Date, Abhijit (Elsevier, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The scarcity of fresh water amongst a growing population is an impending global issue, which must be addressed by utilizing renewable energy sources. A Concentrated Photovoltaic (CPV) and Direct Contact Membrane Distillation ...
  • Crianzas en transformación: formas de parentalidad y nuevos escenarios de cuidado 

    Grau Rebollo, Jorge; Fernández Rasines, Paloma Upna (2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    La crianza de niños y niñas constituye una necesidad básica en la especie humana y todas las culturas conocidas han articulado de un modo u otro los cuidados necesarios para garantizar su desarrollo al menos durante ...
  • Multiplexing optical fiber Fabry-Perot interferometers based on air-microcavities 

    Pérez Herrera, Rosa Ana Upna; Novais, S.; Bravo Acha, Mikel Upna; Leandro González, Daniel Upna; Silva, Susana; Frazão, Orlando; López-Amo Sáinz, Manuel Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work we demonstrate the multiplexing capability of new optical fiber Fabry-Perot interferometers based on airmicrocavities using a commercial FBG interrogator. Three optimized air-microcavity interferometer sensors ...
  • Micro-drilled optical fiber for enhanced laser strain sensors 

    Pérez Herrera, Rosa Ana Upna; Bravo Acha, Mikel Upna; Roldán Varona, Pablo; Leandro González, Daniel Upna; Rodríguez Cobo, L.; López Higuera, José Miguel; López-Amo Sáinz, Manuel Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work, we present an experimental measurement of temperature and strain sensitivities of a micro-drilled optical fiber (MDOF). The MDOF consisted of a quasi-randomly distributed reflector along a single mode fiber ...
  • Gamma radiation measurements using an optical fiber laser 

    Pérez Herrera, Rosa Ana Upna; Stancalie, Andrei; Cabezudo Sánchez-Valverde, Pablo Miguel; Sporea, Dan; Negut, Daniel; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena
    A fiber ring laser cavity configuration was used to analyze the effect of gamma-irradiation over the performance of different types of erbium doped fibers. Preliminary results validates this method to monitor gamma-radiation ...
  • Ultra-long (275 km) random distributed feedback fiber laser for remote sensor monitoring 

    Miguel Soto, Verónica de; Leandro González, Daniel; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena
    An interferometric sensor located 275 km away from the monitoring station has been interrogated by a double-pumped random distributed feedback fiber laser, reaching the longest distance in fiber optic remote sensing reported ...
  • High sensitivity fiber-optic liquid level sensor using biconical tapered fibers 

    Júdez Colorado, Aitor; Leandro González, Daniel Upna; Pérez Herrera, Rosa Ana Upna; Galarza Galarza, Marko; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    A liquid level sensor is presented using a biconical tapered standard single-mode fiber, being its main characteristic an outstanding sensitivity for a low cost transducer. Temperature compensation is enabled with the same ...
  • Microstructured optical fiber sensor for soil moisture measurements 

    López Aldaba, Aitor; López Torres, Diego Upna; Campo-Bescós, Miguel Upna; López Rodríguez, José Javier; Yerro Lizarazu, David; Elosúa Aguado, César Upna; Arregui San Martín, Francisco Javier Upna; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena
    A discrete sensor based on a Sn0₂-FP (Fabry-Pérot) cavity is presented and characterized in real soil conditions. Results are compared, for the first time to our knowledge, with a commercial capacitive sensor and gravimetric ...
  • SnO2-MOF-Fabry-Pérot humidity optical sensor system based on Fast Fourier transform technique 

    López Aldaba, Aitor Upna; López Torres, Diego Upna; Ascorbe Muruzabal, Joaquín Upna; Rota Rodrigo, Sergio Upna; Elosúa Aguado, César Upna; López-Amo Sáinz, Manuel Upna; Arregui San Martín, Francisco Javier Upna; Corres Sanz, Jesús María Upna; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe (SPIE, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this paper, a new sensor system for relative humidity measurements based on a SnO2 sputtering deposition on a microstructured optical fiber (MOF) low-finesse Fabry-Pérot (FP) sensing head is presented and characterized. ...
  • Modulated fiber ring laser and its application in high-sensitivity temperature sensors 

    Pérez Herrera, Rosa Ana Upna; Tainta Ausejo, Santiago Upna; Erro Betrán, María José Upna; López-Amo Sáinz, Manuel Upna (SPIE, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    This work presents an experimental demonstration of a scheme based on an internally modulated fiber ring laser for high-sensitivity temperature sensing. The attained temperature resolution has been as low as ± 2pm even ...
  • Random fiber lasers: application to fiber optic sensors networks 

    López-Amo Sáinz, Manuel Upna; Leandro González, Daniel; Miguel Soto, Verónica de; Bravo Acha, Mikel; Fernández Vallejo, Montserrat; Pérez Herrera, Rosa Ana Upna (IEEE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Recently, random mirrors have been proposed as a method to create fiber laser cavities. This kind of cavity is based on cooperative Rayleigh scattering, which is generated along a fiber due to the material inhomogeneities ...
  • High-resolution transversal load sensor using a random distributed feedback fiber laser 

    Miguel Soto, Verónica de; Leandro González, Daniel; López-Amo Sáinz, Manuel Upna (SPIE, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work, a new application of random distributed feedback lasers to fiber optic sensing has been presented. The particular properties of these lasers, such as the lack of longitudinal modes and high stability, have ...
  • Simultaneous and quasi-independent strain and temperature sensor based on microstructured optical fiber 

    López Aldaba, Aitor Upna; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; López-Amo Sáinz, Manuel Upna (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this paper, a new sensor system for simultaneous and quasi-independent strain and temperature measurements is presented. The interrogation of the sensing head has been carried out by monitoring the FFT phase variations ...
  • Influence of saturable absorbers on fiber ring laser sensors 

    Rodríguez Cobo, L.; Quintela, M. A.; Ruiz Lombera, Rubén; Pérez Herrera, Rosa Ana Upna; López-Amo Sáinz, Manuel Upna; López Higuera, José Miguel (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work, a fiber ring laser sensor has been employed to analyze the influence of passive Er-doped fiber acting as saturable absorber. Lasing modes of fiber ring lasers can be reduced by properly locating a saturable ...
  • Polyaniline deposition on tilted fiber Bragg grating for pH sensing 

    López Aldaba, Aitor Upna; González Vila, Á.; Debliquy, M.; López-Amo Sáinz, Manuel Upna; Caucheteur, C.; Lahem, D. (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this paper, we present the results of a new pH sensor based on a polyaniline (PAni) coating on the surface of a tilted fiber Bragg grating. The pH-sensitive PAni was deposited by in situ chemical oxidative polymerization. ...
  • Relative humidity multi-point optical sensors system based on Fast Fourier multiplexing technique 

    López Aldaba, Aitor Upna; López Torres, Diego Upna; Elosúa Aguado, César Upna; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; Arregui San Martín, Francisco Javier Upna; López-Amo Sáinz, Manuel Upna (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this paper, a new multipoint optical fiber system for relative humidity measurements based on Sn02-FP (Fabry-Pérot) sensing heads and an optical interrogator as single active device is presented and characterized. The ...
  • Simultaneous temperature and vibration monitoring using an all-PM fiber loop mirror interferometer 

    Leandro González, Daniel Upna; López-Amo Sáinz, Manuel Upna (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work, an all-polarization maintaining fiber loop mirror interferometer is presented and validated as vibration and temperature sensor without crosstalk between measurands. The system is entirely built using ...
  • Optical power-based interrogation of plasmonic tilted fiber Bragg grating biosensors 

    González Vila, Á.; López Aldaba, Aitor Upna; Kinet, D.; Mégret, P.; López-Amo Sáinz, Manuel Upna; Caucheteur, C. (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Two interrogation techniques for plasmonic tilted fiber Bragg grating sensors are reported and experimentally tested. Typical interrogation methods are usually based on tracking the wavelength shift of the most sensitive ...
  • Interferometric vs wavelength selective optical fiber sensors for cryogenic temperature measurements 

    Miguel Soto, Verónica de; Leandro González, Daniel Upna; López Aldaba, Aitor Upna; Beato López, Juan Jesús; Pérez de Landazábal Berganzo, José Ignacio; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; López-Amo Sáinz, Manuel Upna (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work, a preliminary study of the behavior of two different interferometric fiber optic sensors and two different wavelength selective fiber optic sensors is performed. A photonic cristal fiber Fabry-Pérot interferometer, ...
  • KISS methodologies for network management and anomaly detection 

    Vega, Carlos; Aracil Rico, Javier Upna; Magaña Lizarrondo, Eduardo Upna (IEEE, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Current networks are increasingly growing in size, complexity and the amount of monitoring data that they produce, which requires complex data analysis pipelines to handle data collection, centralization and analysis tasks. ...

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