Envíos recientes

  • Temperature sensor based on a hybrid ITOsilica resonant cavity 

    Socorro Leránoz, Abián Bentor Upna; Soltani, Soheil; Del Villar, Ignacio Upna; Corres Sanz, Jesús María Upna; Armani, Andrea M. (Optical Society of America, 2015)   Artículo / Artikulua  OpenAccess
    Integrated optical devices comprised of multiple material systems are able to achieve unique performance characteristics, enabling applications in sensing and in telecommunications. Due to ease of fabrication, the majority ...
  • Nanodeposition of materials with complex refractive index in long period fiber gratings 

    Del Villar, Ignacio Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna; Achaerandio, Miguel Upna (IEEE, 2005)   Artículo / Artikulua  OpenAccess
    An overlay of higher refractive index than the cladding is deposited on a Long Period Fiber Grating (LPFG). This permits to improve in a great manner the sensitivity of the device to ambient and overlay refractive index ...
  • ESA-based in-fiber nanocavity for hydrogen–peroxide detection 

    Del Villar, Ignacio Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna; Claus, Richard O. (IEEE, 2005)   Artículo / Artikulua  OpenAccess
    A fiber-optic sensor sensitive to hydrogen peroxide has been designed based on the electrostatic layer-by-layer selfassembly method. Prussian blue has been deposited in a polymeric structure formed by Poly(allylamine ...
  • Enhancement of sensitivity in long period fiber gratings with deposition of low refractive index materials 

    Del Villar, Ignacio Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna (Optical Society of America, 2005)   Artículo / Artikulua  OpenAccess
    It was proved [Opt. Lett. 30, 720 (2005)] that the deposition of an overlay of higher refractive index than that of the cladding on a long-period fiber grating (LPFG) causes large shifts in the attenuation bands induced by ...
  • Deposition of an overlay with electrostactic self-assembly method in long period fiber gratings 

    Del Villar, Ignacio Upna; Achaerandio, Miguel Upna; Matias, Ignacio R.; Arregui San Martín, Francisco Javier Upna (Optical Society of America, 2005)   Artículo / Artikulua  OpenAccess
    It was proved that the deposition of an overlay material onto a long-period fiber grating causes important shifts in the wavelengths of the typical attenuation bands that are caused by coupling between cladding and core ...
  • Influence in cladding mode distribution of overlay deposition on long-period fiber gratings 

    Del Villar, Ignacio Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna (Optical Society of America, 2006)   Artículo / Artikulua  OpenAccess
    A thin overlay of higher refractive index than that of the cladding of a long-period fiber grating induces in cladding modes strong variations in effective index, mode profile, cross-coupling coefficient with the core ...
  • Luminescence-based optical sensors fabricated by means of the layer-by-layer nano-assembly technique 

    Acha Morrás, Nerea de Upna; Elosúa Aguado, César Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna (MDPI, 2017)   Artículo / Artikulua  OpenAccess
    Luminescence-based sensing applications range from agriculture to biology, including medicine and environmental care, which indicates the importance of this technique as a detection tool. Luminescent optical sensors are ...
  • An optimized method based on digitalized Lissajous curve to determine fifetime of luminescent materials on optical fiber sensors 

    Ridruejo Muro, Adrián; Acha Morrás, Nerea de Upna; Elosúa Aguado, César Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna (Hindawi Publishing Corporation, 2016)   Artículo / Artikulua  OpenAccess
    A method is proposed to determine lifetime of luminescent emissions based on the phase shift measurement employing the digitalized Lissajous representation: this diagramhas been typically used with analogical algorithms, ...
  • Long period fiber gratings with overlay of variable refractive index 

    Del Villar, Ignacio Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna (IEEE, 2005)   Artículo / Artikulua  OpenAccess
    A theoretical analysis is presented of a long-period fiber grating (LPFG) with an overlay of variable refractive index. The highest sensitivity of the resonance wavelengths to variations in the refractive index of the ...
  • Strategies for fabrication of hydrogen peroxide sensors based on electrostatic self-assembly (ESA) method 

    Del Villar, Ignacio Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna; Echeverría, Jesus; Claus, Richard O. (Elsevier, 2004)   Artículo / Artikulua  OpenAccess
    An optical fiber sensor has been fabricated for detection of 5 M–0.1mM concentrations of hydrogen peroxide with a linear response. The deposition method used is electrostatic self-assembly (ESA) of polymer cationic and ...
  • Spectral evolution with incremental nanocoating of long period fiber gratings 

    Del Villar, Ignacio Upna; Corres Sanz, Jesús María Upna; Achaerandio, Miguel Upna; Arregui San Martín, Francisco Javier Upna; Matías Maestro, Ignacio Upna (Optical Society of America, 2006)   Artículo / Artikulua  OpenAccess
    The incremental deposition of a thin overlay on the cladding of a long-period fiber grating (LPFG) induces important resonance wavelength shifts in the transmission spectrum. The phenomenon is proved theoretically with ...
  • Generation of selective fringes with cascaded long-period gratings 

    Del Villar, Ignacio Upna; Achaerandio, Miguel Upna; Arregui San Martín, Francisco Javier Upna; Matías Maestro, Ignacio Upna (IEEE, 2006)   Artículo / Artikulua  OpenAccess
    The inscription of cascaded long-period gratings of different periods in optical fiber permits us to obtain both narrowband and wideband filters in the same spectrum. If used as an optical transducer, it may permit us ...
  • Fringe generation with non-uniformly coated long-period fiber gratings 

    Del Villar, Ignacio Upna; Arregui San Martín, Francisco Javier Upna; Matias, Ignacio R.; Cusano, Andrea; Paladino, Domenico; Cutolo, Antonello (Optical Society of America, 2007)   Artículo / Artikulua  OpenAccess
    In this work, the spectral characteristics of non-uniform symmetrically ring shaped coatings deposited on long-period fiber gratings (LPFGs) have been theoretically and experimentally investigated. To optimize the ...
  • Generation of lossy mode resonances by deposition of high-refractive-index coatings on uncladded multimode optical fibers 

    Del Villar, Ignacio Upna; Ruiz Zamarreño, Carlos Upna; Sánchez Zábal, Pedro Upna; Hernaez, Miguel; Fernández Valdivielso, Carlos Upna; Arregui San Martín, Francisco Javier Upna; Matías Maestro, Ignacio Upna (IOP Publishing Ltd, 2010)   Artículo / Artikulua  OpenAccess
    A comparative study of lossy mode resonances generated by depositing two different materials is presented. The two materials selected are indium tin oxide (ITO) and indium oxide. The two materials present different ...
  • Generation of lossy mode resonances with absorbing thin-films 

    Del Villar, Ignacio Upna; Ruiz Zamarreño, Carlos Upna; Hernaez, Miguel; Arregui San Martín, Francisco Javier Upna; Matías Maestro, Ignacio Upna (IEEE, 2010)   Artículo / Artikulua  OpenAccess
    The generation of lossy mode resonances with absorbing thin-films is analyzed with electromagnetic theory. The main differences with surface plasmon resonances are presented and some rules are given towards an optimum ...
  • Resonances in coated long period fiber gratings and cladding removed multimode optical fibers: a comparative study 

    Del Villar, Ignacio Upna; Zamarreño, Carlos R.; Hernaez, Miguel; Arregui San Martín, Francisco Javier Upna; Matías Maestro, Ignacio Upna (Optical Society of America, 2010)    OpenAccess
    Two optical fiber devices have been coated in parallel: a long period fiber grating (LPFG) and a cladding-removed multimode optical fiber (CRMOF). The progressive coating of the LPFG by means of the layer-by-layer ...
  • Lossy mode resonance generation with indium tin oxide coated optical fibers for sensing applications 

    Del Villar, Ignacio Upna; Ruiz Zamarreño, Carlos Upna; Hernaez, Miguel; Arregui San Martín, Francisco Javier Upna; Matías Maestro, Ignacio Upna (IEEE, 2010)   Artículo / Artikulua  OpenAccess
    Surface plasmon resonances and lossy mode resonances can be generated with Indium Tin Oxide (ITO) coated optical fibers. Both phenomena are analyzed and compared. Lossy mode resonances present important advantages: ...
  • Sensors based on thin-film coated cladding removed multimode optical fiber and single-mode multimode single-mode fiber: a comparative study 

    Del Villar, Ignacio Upna; Socorro Leránoz, Abián Bentor Upna; Hernaez, Miguel; Corres Sanz, Jesús María Upna; Ruiz Zamarreño, Carlos Upna; Sánchez Zábal, Pedro Upna; Arregui San Martín, Francisco Javier Upna; Matías Maestro, Ignacio Upna (Hindawi Publishing Corporation, 2015)   Artículo / Artikulua  OpenAccess
    Two simple optical fibre structures that do not require the inscription of a grating, a cladding removed multimode optical fibre (CRMOF) and a single-mode multimode single-mode structure (SMS), are compared in terms of ...
  • Design rules for lossy mode resonance based sensors 

    Del Villar, Ignacio Upna; Hernaez, Miguel; Ruiz Zamarreño, Carlos Upna; Sánchez Zábal, Pedro Upna; Fernández Valdivielso, Carlos Upna; Arregui San Martín, Francisco Javier Upna; Matias, Ignacio R. (Optical Society of America, 2012)   Artículo / Artikulua  OpenAccess
    Lossy mode resonances can be obtained in the transmission spectrum of cladding removed multimode optical fiber coated with a thin-film. The sensitivity of these devices to changes in the properties of the coating or the ...
  • Optimization of sensors based on multimode interference in single-mode–multimode– single-mode structure 

    Del Villar, Ignacio Upna; Socorro Leránoz, Abián Bentor Upna; Corres Sanz, Jesús María Upna; Arregui San Martín, Francisco Javier Upna; Matías Maestro, Ignacio Upna (IEEE, 2013)   Artículo / Artikulua  OpenAccess
    By coating a single-mode–multimode–single-mode (SMS) structure with a complex refractive index thin-film the central wavelength of the transmission and attenuation bands of the optical spectrum can be shifted. By adequate ...

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