Now showing items 1-20 of 34

    • Application of remote power-by-light switching in a simplified BOTDA sensor network 

      Bravo Acha, Mikel Upna; Zornoza Indart, Ander; Loayssa Lara, Alayn Upna; López-Amo Sáinz, Manuel Upna; López Higuera, José Miguel; Ullán Nieto, Angel (MDPI, 2013)   Artículo / Artikulua  OpenAccess
      We propose and demonstrate the use of spatial multiplexing as a means to reduce the costs of distributed sensing networks. We propose a new scheme in which remote power-by-light switching is deployed to scan multiple ...
    • Compact and highly-efficient polarization independent vertical resonant couplers for active-passive monolithic integration 

      Galarza Galarza, Marko; Thourhout, Dries Van; Baets, Roel; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2008)   Artículo / Artikulua  OpenAccess
      Compact low-loss polarization independent vertical coupling between a 1.55 μm InGaAsP bulk active waveguide and a passive waveguide based on bimodal interference is presented. Simulation results show low coupling loss (<0.1 ...
    • Comparison between capacitive and microstructured optical fiber soil moisture sensors 

      López Aldaba, Aitor Upna; López Torres, Diego Upna; Campo Bescós, Miguel Ángel 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 (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      Soil moisture content has always been an important parameter to control because it is a deterministic factor for site-specific irrigation, seeding, transplanting, and compaction detection. In this work, a discrete sensor ...
    • Comparison of wavelength-division-multiplexed distributed fiber Raman amplifier networks for sensors 

      Díaz Lucas, Silvia Upna; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2006)   Artículo / Artikulua  OpenAccess
      A novel distributed fiber Raman amplified star topology used for optical sensor wavelength-division multiplexing is proposed. The performance of this star configuration is compared to an optically amplified bus topology. ...
    • Contribution to the development of new photonic systems for fiber optic sensing applications 

      Bravo Acha, Mikel Upna (2015)   Tesis doctoral / Doktoretza tesia  OpenAccess
      En este trabajo de doctorado se presentan nuevos sistemas y subsistemas de sensores de fibra óptica. Así, se proponen y desarrollan nuevas técnicas, componentes y tecnologías basadas en láseres de fibra con espejos ...
    • Development of advanced structures for optical fiber lasers and sensors 

      Rota Rodrigo, Sergio Upna (2015)   Tesis doctoral / Doktoretza tesia  OpenAccess
      Desde la irrupción de la fibra óptica en las telecomunicaciones, han surgido multitud de desarrollos basados en sus propiedades. Así, en las últimas décadas, la rápida evolución de los sistemas basados en fibra óptica, así ...
    • Dual stage ytterbium doped fiber laser in MOPA configuration 

      Fernández Vallejo, Montserrat Upna; Monelli, D.; Passaro, D.; Cucinotta, A.; Selleri, S.; López-Amo Sáinz, Manuel Upna (Bentham Open, 2012)   Artículo / Artikulua  OpenAccess
      We report the experimental demonstration of an Ytterbium doped fiber laser (YDFL) composed by two stages in cascade. Two sorts of Ytterbium doped fiber (YDF) with different concentration have been used. A proper characterization ...
    • Dual-wavelength single-longitudinal-mode erbium fiber laser for temperature measurements 

      Díaz Lucas, Silvia Upna; López-Amo Sáinz, Manuel Upna (SPIE, 2014)   Artículo / Artikulua  OpenAccess
      A dual-wavelength erbium fiber laser with single-longitudinal-mode characteristic is proposed and demonstrated. The system uses a 7-m-long highly doped erbium-doped fiber as the primary gain medium while two fiber Bragg ...
    • ECOAL project: delivering solutions for integrated monitoring of coal-related fires supported on optical fiber sensing technology 

      Ribeiro, Joana; Viveiros, Duarte; Ferreira, João; López Gil, Alexia; Domínguez López, Alejandro; Martins, Hugo F.; Pérez Herrera, Rosa Ana Upna; López Aldaba, Aitor Upna; Duarte, Lia; Rodrigues Pinto, Ana Margarida Upna; Martín López, Sonia; Baierl, Hardy; Jamier, Raphael; Rougier, Sébastien; Auguste, Jean-Louis; Teodoro, Ana Cláudia; Gonçalves, José Alberto; Esteban, Óscar; Santos, José Luís; Roy, Philippe; López-Amo Sáinz, Manuel Upna; González Herráez, Miguel; Baptista, José Manuel; Flores, Deolinda (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      The combustion of coal wastes resulting from mining is of particular environmental concern, and the importance of proper management involving real-time assessment of their status and identification of probable evolution ...
    • Experimental and numerical characterization of a hybrid Fabry-Perot cavity for temperature sensing 

      López Aldaba, Aitor Upna; Rodrigues Pinto, Ana Margarida Upna; López-Amo Sáinz, Manuel Upna; Frazão, Orlando; Santos, José Luís; Baptista, José Manuel; Baierl, Hardy; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe (MDPI, 2015)   Artículo / Artikulua  OpenAccess
      A hybrid Fabry-Pérot cavity sensing head based on a four-bridge microstructured fiber is characterized for temperature sensing. The characterization of this cavity is performed numerically and experimentally in the L-band. ...
    • Fiber cavity ring down and gain amplification effect 

      Silva, Susana; Magalhães, Regina; Pérez Herrera, Rosa Ana Upna; López-Amo Sáinz, Manuel Upna; Marques, M. B.; Frazão, Orlando (Springer Nature, 2016)   Artículo / Artikulua  OpenAccess
      The effect of an erbium-doped fiber amplifier (EDFA) placed inside the fiber ring of a cavity ring down (CRD) configuration is studied. The limitations and advantages of this configuration are discussed, and the study of ...
    • La fotónica y el año internacional de la luz 

      López-Amo Sáinz, Manuel Upna (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2015)   Otros / Bestelakoak  OpenAccess
      El autor analiza la importancia de la luz en nuestra sociedad.
    • Fotonika eta argiaren nazioarteko urtea 

      López-Amo Sáinz, Manuel Upna (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2015)   Otros / Bestelakoak  OpenAccess
    • 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 ...
    • 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 ...
    • An in-reflection strain sensing head based on a Hi-Bi photonic crystal fiber 

      Rota Rodrigo, Sergio Upna; Rodrigues Pinto, Ana Margarida Upna; Bravo Acha, Mikel Upna; López-Amo Sáinz, Manuel Upna (MDPI, 2013)   Artículo / Artikulua  OpenAccess
      A photonic crystal fiber-based sensing head is proposed for strain measurements. The sensor comprises a Hi-Bi PCF sensing head to measure interferometric signals in-reflection. An experimental background study of ...
    • 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 ...
    • Micro-displacement sensor based on a hollow-core photonic crystal fiber 

      Rodrigues Pinto, Ana Margarida Upna; López-Amo Sáinz, Manuel Upna; Baptista, José Manuel; Santos, José Luís; Frazão, Orlando (MDPI, 2012)   Artículo / Artikulua  OpenAccess
      A sensing head based on a hollow-core photonic crystal fiber for in-reflection measurement of micro-displacements is presented. The sensing structure takes advantage of the multimodal behavior of a short segment ...
    • Multiplexing of six micro-displacement suspended-core Sagnac interferometer sensors with a Raman-Erbium fiber laser 

      Bravo Acha, Mikel Upna; Fernández Vallejo, Montserrat Upna; 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 ...
    • New multiplexing structures for fiber optic sensors 

      Leandro González, Daniel Upna (2016)   Tesis doctoral / Doktoretza tesia  OpenAccess
      El campo de la fibra óptica ha sufrido una rápida evolución durante las últimas décadas debido a sus buenas prestaciones en aplicaciones de telecomunicaciones. Aprovechando este avance científico y técnico en componentes ...