Now showing items 1-15 of 15

    • AC/DC millivoltage sensor by means of ITO-coated optical fibers: towards monitoring of biosignals 

      Aginaga Etxamendi, Concepción Isabel Upna; Socorro Leránoz, Abián Bentor Upna Orcid; Fuentes Lorenzo, Omar Upna; Del Villar, Ignacio Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This contribution shows the monitoring of AC and DC millivoltage signals by means of lossy mode resonances generated by Indium Tin Oxide (ITO) on optical fibers. Sensors were obtained by sputtering ITO thin-films onto 25 ...
    • Desarrollo de sensores basados en guía de onda plana y fibra óptica 

      Fuentes Lorenzo, Omar Upna (2022)   Tesis doctoral / Doktoretza tesia  OpenAccess
      En este trabajo de tesis se muestra el estudio y diseño de varias estructuras de guías de ondas ópticas. En los primeros capítulos se trabaja sobre configuraciones ya conocidas basadas en fibras monomodo – multimodo – ...
    • Generation of lossy mode resonances in planar waveguides toward development of humidity sensors 

      Fuentes Lorenzo, Omar Upna; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Del Villar, Ignacio Upna Orcid (IEEE, 2019)   Artículo / Artikulua  OpenAccess
      Lossy mode resonances (LMRs) are typically obtained with optical fibre. The Kretschmann configuration is an alternative but LMRs are generated with angles approaching grazing incidence. In this work, a new setup is explored, ...
    • Generation of lossy mode resonances with different nanocoatings deposited on coverslips 

      Fuentes Lorenzo, Omar Upna; Goicoechea Fernández, Javier Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Del Villar, Ignacio Upna Orcid; Ozcariz Celaya, Aritz Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Optical Society of America, 2020)   Artículo / Artikulua  OpenAccess
      The generation of lossy mode resonances (LMRs) with a setup based on lateral incidence of light in coverslips is a simple platform that can be used for sensing. Here the versatility of this platform is proved by studying ...
    • Highly sensitive sensor for measuring material thermal expansion using a ring laser 

      Díaz Lucas, Silvia Upna Orcid; Fuentes Lorenzo, Omar Upna; Torres Betancourt, Angie Tatiana; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2023)   Artículo / Artikulua  OpenAccess
      A new thermal expansion sensor is presented in this letter. It combines an interferometric fiber sensor and an erbium-doped fiber ring laser as the light source. The sensor consists of a combination of single-mode, ...
    • Improving the width of lossy mode resonances in a reflection configuration D-shaped fiber by nanocoating laser ablation 

      Fuentes Lorenzo, Omar Upna; Vaiano, Patrizio; Del Villar, Ignacio Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Optical Society of America, 2020)   Artículo / Artikulua  OpenAccess
      The full width at half maximum (FWHM) of lossy mode resonances (LMRs) in the optical spectrum depends on the homogeneity of the thin film deposited. In this Letter, a method for improving the FWHM is applied for an LMR ...
    • Increasing the sensitivity of an optic level sensor with a wavelength and phase sensitive single-mode multimode single-mode (SMS) fiber structure 

      Fuentes Lorenzo, Omar Upna; Del Villar, Ignacio Upna Orcid; Vento, José R.; Socorro Leránoz, Abián Bentor Upna Orcid; Gallego Martínez, Elieser Ernesto; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2017)   Artículo / Artikulua  OpenAccess
      The sensitivity of a liquid level sensor based on a single-mode-multimode-single-mode fiber structure has been increased by hydrofluoric acid etching. The etching process was analyzed and monitored both theoretical and ...
    • Interdigital concept in photonic sensors based on an array of lossy mode resonances 

      Domínguez Rodríguez, Ismel Upna Orcid; Del Villar, Ignacio Upna Orcid; Fuentes Lorenzo, Omar Upna; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Nature Research, 2021)   Artículo / Artikulua  OpenAccess
      Multi-parameter detection is key in the domain of sensors. Here it is demonstrated that an indium tin oxide (ITO) nanocoating can be used to generate multiple lossy mode resonances (LMRs) in the optical spectrum. To achieve ...
    • Lossy mode resonance sensors based on lateral light incidence in nanocoated planar waveguides 

      Fuentes Lorenzo, Omar Upna; Del Villar, Ignacio Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Nature Research, 2019)   Artículo / Artikulua  OpenAccess
      The deposition of an indium oxide (In2O3) thin film on conventional planar waveguides (a coverslip and a glass slide) allows generating lossy mode resonances (LMR) by lateral incidence of light on the waveguide and by ...
    • Multichannel refractometer based on lossy mode resonances 

      Fuentes Lorenzo, Omar Upna; Corres Sanz, Jesús María Upna Orcid; Domínguez Rodríguez, Ismel Upna Orcid; Del Villar, Ignacio Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2022)   Artículo / Artikulua  OpenAccess
      In this work a new multiparameter sensor platform based on lossy mode resonances is presented. The structure consists of a soda-lime optical slab waveguide butt-coupled to multimode optical fibers. A variable thickness ...
    • Optical fiber vacuum sensor based on etched SMS structure and PDMS coating 

      Ascorbe Muruzabal, Joaquín Upna Orcid; Fuentes Lorenzo, Omar Upna; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Corres Sanz, Jesús María Upna Orcid (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      In this work, an optical fiber vacuum sensor based on a single-mode multimode single-mode (SMS) structure coated with polydimethylsiloxane (PDMS) is studied. The SMS structure generates an interferometric pattern based on ...
    • Optical fiber vacuum sensor based on modal interferometer and PDMS coating 

      Ascorbe Muruzabal, Joaquín Upna Orcid; Fuentes Lorenzo, Omar Upna; Corres Sanz, Jesús María Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This work studies the behavior of polydimethylsiloxane (PDMS) as a transducer for optical vacuum pressure measurements. The optical structure chosen for this device is a modal interferometer achieved by splicing a coreless ...
    • Optimized strain long-period fiber grating (LPFG) sensors operating at the dispersion turning point 

      Del Villar, Ignacio Upna Orcid; Fuentes Lorenzo, Omar Upna; Chiavaioli, Francesco; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2018)   Artículo / Artikulua  OpenAccess
      Two phenomena for enhancing the sensitivity of longperiod fiber gratings are combined toward an increase of the sensitivity to strain of this type of devices: the dispersion turning point (DTP) and the cladding diameter ...
    • Sensitivity enhancement in low cutoff wavelength long-period fiber gratings by cladding diameter reduction 

      Del Villar, Ignacio Upna Orcid; Partridge, Matthew; Rodríguez Rodríguez, Wenceslao Eduardo; Fuentes Lorenzo, Omar Upna; Socorro Leránoz, Abián Bentor Upna Orcid; Díaz Lucas, Silvia Upna Orcid; Corres Sanz, Jesús María Upna Orcid; James, Stephen; Tatam, Ralph (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      The diameter of long-period fiber gratings (LPFGs) fabricated in optical fibers with a low cutoff wavelength was be reduced by hydrofluoric acid etching, enhancing the sensitivity to refractive index by more than a factor ...
    • Simultaneous generation of surface plasmon and lossy mode resonances in the same planar platform 

      Fuentes Lorenzo, Omar Upna; Del Villar, Ignacio Upna Orcid; Domínguez Catena, Iris Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      A planar waveguide consisting of a coverslip for a microscope glass slide was deposited in one of its two faces with two materials: silver and indium tin oxide (ITO). The incidence of light by the edge of the coverslip ...

      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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