• Dual-cavity fiber fabry-perot interferometer coated with SnO2for relative humidity and temperature sensing 

      Domínguez Flores, Carmen E.; Rodríguez-Quiroz, Osvaldo; Monzón-Hernández, David; Ascorbe Muruzabal, Joaquín Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      An optical fiber tip interferometer for the measurement of relative humidity (RH) and temperature is proposed. The optical fiber structure used, a dual-cavity optical fiber Fabry-Perot interferometer (DFFPI), is ...
    • Evaluating noise in passive beam forming networks for multibeam applications 

      Biurrun Quel, Carlos Upna Orcid; Río Bocio, Carlos del Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      In this work, we identify that the analysis in terms of noise of multibeam passive beam forming networks requires a proper formulation, in order not to overestimate the noise generated by the network. We show that the ...
    • Non-invasive aging analysis of lithium-ion batteries in extreme cold temperatures 

      Soto Cabria, Adrián Upna Orcid; Berrueta Irigoyen, Alberto Upna Orcid; Oficialdegui, Ignacio; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (IEEE, 2021)   Artículo / Artikulua  OpenAccess
      This paper presents a non-invasive technical analysis of the degra-dation of four lithium-ion batteries (LIBs) used in extreme frigid weather. In contrast to other studies in which the batteries were tested in laboratory ...
    • Simultaneous measurement of humidity and temperature based on a partially coated optical fiber long period grating 

      Urrutia Azcona, Aitor Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Ricchiuti, Amelia L.; Barrera, D.; Arregui San Martín, Francisco Javier Upna Orcid (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      A humidity and temperature optical fiber sensor based on a long-period grating (LPG), which can provide simultaneous response to both magnitudes, is proposed and demonstrated via experiments. Previously, the LPG was fully ...

      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
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