Recent Submissions

  • 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 ...
  • Microstructured optical fiber sensor for soil moisture measurements 

    López Aldaba, Aitor Upna; 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 ...
  • Ultra-long (275 km) random distributed feedback fiber laser for remote sensor monitoring 

    Miguel Soto, Verónica de; Leandro González, Daniel Upna; 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 ...
  • 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 Upna; Miguel Soto, Verónica de; Bravo Acha, Mikel Upna; Fernández Vallejo, Montserrat Upna; 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 ...
  • 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 ...
  • 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 ...
  • Using modelling techniques to analyze urban freight distribution. A case study in Pamplona (Spain) 

    Álvarez, Pablo; Serrano Hernández, Adrián; Faulín Fajardo, Javier Upna; Juan, Ángel Alejandro (Elsevier, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The city of Pamplona, in Spain, is currently experiencing several changes regarding sustainable mobility such as pedestrianization of some streets in the city center, and access control to the Old Town for motor vehicles ...
  • Latest research on long-range Brillouin distributed sensing 

    Loayssa Lara, Alayn Upna; Urricelqui Polvorinos, Javier Upna; Iribas Pardo, Haritz Upna; Mariñelarena Ollacarizqueta, Jon Upna; Mompó Roselló, Juan José Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    We review the latest developments in long-range Brillouin optical time-domain analysis sensors. The factors that impair the performance of these sensors, particularly in terms of their distance range, are discussed together ...
  • Determining an optimal area to locate a biorefinery under economic and environmental criteria 

    Serrano Hernández, Adrián; Faulín Fajardo, Javier Upna; Pintor Borobia, Jesús María Upna; Belloso Ezcurra, Javier (Elsevier BV, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Facilities location is a strategic decision which has to be carefully considered because it could involve the failure or success of a business. For that reason, anything that helps decision makers to facilitate their ...
  • Dual-probe linearly-configured BOCDA system with enlarged modulation amplitude 

    Mariñelarena Ollacarizqueta, Jon Upna; Kim, Yong Hyun; Loayssa Lara, Alayn Upna; Song, Kwang Yong (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    We present and experimentally demonstrated a linearly-configured Brillouin optical correlation domain analysis (LC-BOCDA) system that allows large modulation amplitude (Δf) based on a dual probe wave and the control of ...
  • Implementation and analysis of a wireless sensor network-based pet location monitoring system for domestic scenarios 

    Aguirre Gallego, Erik Upna; López Iturri, Peio Upna; Azpilicueta Fernández de las Heras, Leyre Upna; Astrain Escola, José Javier Upna; Villadangos Alonso, Jesús Upna; Santesteban Martínez de Morentin, Daniel; Falcone Lanas, Francisco Javier Upna (MDPI, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The flexibility of new age wireless networks and the variety of sensors to measure a high number of variables, lead to new scenarios where anything can be monitored by small electronic devices, thereby implementing Wireless ...
  • Detection of ethanol in human breath using optical fiber long period grating coated with metal-organic frameworks 

    Acha Morrás, Nerea de Upna; Hromadka, Jiri; Tokay, Begum; Correia, Ricardo; Elosúa Aguado, César Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna; Morgan, Stephen P.; Korposh, Sergiy (MDPI, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    An optical fiber sensor for ethanol detection in exhaled breath has been developed. It has been fabricated by functionalizing a Long Period Grating with a metal-organic framework, ZIF-8. The sensor’s response was tested ...
  • Title enhancement of the sensitivity of a volatile organic compounds MOF-sensor by means of its structure 

    López Torres, Diego Upna; López Aldaba, Aitor Upna; Elosúa Aguado, César Upna; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; López-Amo Sáinz, Manuel Upna; Arregui San Martín, Francisco Javier Upna (MDPI, 2017)   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. ...
  • Monitoring the etching process in LPFGs towards development of highly sensitive sensors 

    Del Villar, Ignacio Upna; Cruz, José Luis; Socorro Leránoz, Abián Bentor Upna; Díaz Lucas, Silvia Upna; Corres Sanz, Jesús María Upna; Arregui San Martín, Francisco Javier Upna; Matías Maestro, Ignacio Upna (MDPI, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work, the monitoring of the etching process up to a diameter of 30 µm of two LPFG structures has been compared, one of them had initially 125 µm, whereas the second one had 80 µm. By tracking the wavelength shift ...