Person:
González Cano, Agustín

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First Name
Agustín
Last Name
González Cano
URI
https://hdl.handle.net/20.500.14352/79943
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Óptica y Optometría
Department
Óptica
Area
Optica
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2004 - 200942010 - 20135
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Author: Díaz Herrera, Natalia × Has files: false ×

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Now showing 1 - 9 of 9
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    Moving the wavelength detection range in surface plasmon resonance sensors based on tapered optical fibers
    (Fourth European Workshop on Optical Fibre Sensors, 2010) Díaz Herrera, Natalia; González Cano, Agustín; Viegas, Diana Catarino das Neves; Santos, José Luis; Navarrete Fernández, María Cruz; Esteban Martínez, Óscar
    It is shown how the design possibilities offered by double-layer uniform-waist tapered optical fibers (DLUWTs) permit to move the wavelength detection range to adapt the response of the sensors to varied conditions. In particular, we have obtained very good experimental curves showing that we can achieve plasmon resonances in the C-band of the optical communications, around 1.5 μm, for the range of refractive indices of aqueous media, highly interesting in the biosensors field. Also, we show results for other interesting wavelength region, around 500 nm, where we can take advantage of the absorption peaks of the analytes. Finally, we explore the possibilities of using InN as a dielectric material for the second layer of the deposition. These results contribute to considerably expand the applicability and performance of SPR fiber sensors.
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    Miniature Fiber Bragg Grating Strain Rosette Based on Lossless Tapers
    (21st International Conference on Optical Fiber Sensors, 2011) Viegas, Diana Catarino das Neves; Navarrete Fernández, María Cruz; Díaz Herrera, Natalia; González Cano, Agustín; Santos , Jose Luis; Araújo, Fernanda Mendes
    A miniature fiber Bragg grating strain rosette is presented. The proposed design is made possible through the development of low curvature radius lossless tapers, thus offering advantages in miniaturization of the rosette configuration. We report on the experimental validation of the miniature rosette design, demonstrating its effective operation.
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    Uniform-waist tapered optical fibers with double-layer deposition.
    (Second European Workshop On Optical Fibre Sensors: Proceedings, 2004) González Cano, Agustín; Díaz Herrera, Natalia; Navarrete Fernández, María Cruz; Esteban Martínez, Óscar; Bueno Guillén, Francisco Javier
    Novel devices consisting of uniform-waist tapered optical fibers with a double layer (metal plus dielectric) deposition are presented and their properties in terms of optical transmission are studied. Excitation of surface plasmons in the metallic layers is experimentally shown. These devices can be used as basis for new sensors.
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    An experimental evaluation of the behavior of SPR fiber sensors in absorptive medium when plasmons are tuned to absorption peak: method for selective measurement
    (21st International Conference on Optical Fiber Sensors, 2011) Leite, I.; Navarrete Fernández, María Cruz; Díaz Herrera, Natalia; González Cano, Agustín; Esteban Martínez, Óscar
    In this work we present experimental results that confirm the influence of an absorptive surrounding medium in the behavior of conventional SPR fiber sensors. It can be observed that when a plasmon resonance coincides with a wavelength absorbed by the medium, the depth of the dip is affected, as predicted in the simulations. The results are important from the basic point of view, since the influence of absorptive medium in plasma waves has not been sufficiently studied up to date and they can also be used as the basis for a new method of SPR-based refractometry selective to specific analytes without the need of the addition of recognizing elements to the transducer.
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    Fiber-optic salinity probe
    (Second European Workshop On Optical Fibre Sensors: Proceedings, 2004) Díaz Herrera, Natalia; Esteban Martínez, Óscar; Navarrete Fernández, María Cruz; González Cano, Agustín
    An optical-fiber salinometer has been evaluated during a two-week measurement campaign in the Baltic Sea. The obtained results in three different tests are presented in comparison with those obtained with a standard electric CTD sonde commercially available.
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    Improved performance of SPR optical fiber sensors with InN as dielectric cover
    (21st International Conference on Optical Fiber Sensors, 2011) Esteban Martínez, Óscar; Naranjo Vega, Fernando Bernabé; Díaz Herrera, Natalia; Valdueza Felip, Sirona; Navarrete Fernández, María Cruz; González Cano, Agustín
    In this work, the performance of uniform-waist tapered optical fiber sensors based on SPR with Indium Nitride (InN) as dielectric layer has been experimentally studied. The obtained results show that the overall performance in terms of reliability, long term stability and sensitivity is improved. Furthermore, the dependence of the sensitivity with the thickness of the dielectric layer is also studied, showing that increases as the thickness decreases while the well known trend to excite the surface plasmons at longer wavelengths or higher refractive index of the outer medium is kept. Thus, a novel application of the InN to optical fiber sensors is demonstrated. The use of this material would be of great interest to produce new, improved, SPR-based devices for chemical and biological sensing.
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    Extension of Surface Plasmon Resonance in fiber optic sensors into the visible region
    (Fifth European Workshop On Optical Fibre Sensors, 2013) Navarrete Fernández, María Cruz; Díaz Herrera, Natalia; González Cano, Agustín; Esteban Martínez, Óscar
    In this work we experimentally show how the technology of surface plasmon resonance (SPR) in doubly deposited uniform-waist tapered optical fiber sensors (DLUWTs) can be extended into the visible region (around 520 nm) by changing the thicknesses of the deposited layers. In this way, by using DLUWTs we can cover, in an easy and versatile way, a total wavelength range over 1000 nm wide, having shown in the past how this same kind of sensors can be usable in the communication band. The possibilities of fiber sensors can then be applied to the region of visible wavelengths, which is very interesting from the biological point of view.
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    Multiparametric in-situ spectroscopic measuring system for coastal monitoring employed under field conditions in the Gulf of Gdansk (Baltic Sea).
    (Proceedings of the Fourteenth (2004) International Offshore and Polar Engineering Conference, 2004) Esteban Martínez, Óscar; Navarrete Fernández, María Cruz; Díaz Herrera, Natalia; González Cano, Agustín; Bernabeu Martínez, Eusebio
    A new type of multiparametric optical sensor system for in-situ measurements in seawater was tested under real conditions. Central to the system is an underwater core instrument (CI) which contains light sources and a multichannel spectrometer with CCD detector. The three optical sensors were connected to the instrument via optical fibres: a SERS optode for detection of organic compounds, a dissolved oxygen optode and a salinity sensor. We here present the first results of the sensors of the cruise. During the two week field trial in the Gulf of Gdansk the three different deployment scenarios were performed: stationary measurements, depth profiles and towing experiments. In addition, conventional oceanographic data were measured with commercial probes.
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    DL-UWTs: novel devices for chemical and biological sensing
    (Third European Workshop on Optical Fibre Sensors, 2007) González Cano, Agustín; Díaz Herrera, Natalia; Navarrete Fernández, María Cruz; Esteban Martínez, Óscar
    Although many optical fiber sensors have been proposed for chemical, environmental or biological measurements, it seems that the potential of this kind of devices has not been fully exploited. In this paper we discuss the possibilities of doubly-deposited uniform-waist tapered fibers (DL-UWTs) for the development of new sensors that can become a new standard in the field of Surface Plasmon Resonance (SPR) based sensors and contribute to the extension of the range of application of fiber technology to the mentioned fields. We also compare different configuration and evaluate some relevant features of DL-UWTs, as the possibility of fully independence of polarization or the excitation of multiple plasmons.