Fuster Escuder, José Miguel

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    Publication
    Photonic RF phase modulator with harmonic up-conversion for digital microwave link applications
    (John Wiley & Sons, 2000-01-05) Candelas Valiente, Pilar; Fuster Escuder, José Miguel; Martí Sendra, Javier; Martínez Zaldívar, Francisco José; Departamento de Física Aplicada; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Instituto Universitario de Telecomunicación y Aplicaciones Multimedia; Instituto Universitario de Tecnología Nanofotónica; Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica; Ministerio de Educación y Cultura
    [EN] A photonic integrated-optic RF phase modulator with harmonic up-con¿ersion for digital microwa¿e link applications is presented. This de¿ice achie¿es both electrical phase modulation and harmonic up-con¿ersion of an electrical local oscillator dri¿ing signal. Simulation results are pro¿ided for a se¿enth-harmonic 38.5 GHz transmission of a 155 Mbit r s 8-PSK signal through a 1 km fiber span
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    Observation of ultrasonic Talbot effect in perforated plates
    (Elsevier, 2019) Candelas Valiente, Pilar; Fuster Escuder, José Miguel; Pérez-López, Sergio; Uris Martínez, Antonio; Rubio Michavila, Constanza; Departamento de Física Aplicada; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Escuela Técnica Superior de Ingeniería Industrial; Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica; Escuela Técnica Superior de Ingeniería Agronómica y del Medio Natural; Ministerio de Economía y Competitividad
    [EN] The Talbot effect using ultrasonic waves transmitted through a periodic perforated plate is presented. The ultrasonic wave-field at the exit of the perforated plate replicates the perforated pattern at the Talbot distance. Experimental results are validated by an analytical model. The measured propagating wave-field is consistent with the analytical results. The influence of the grating size and the filling fraction on the Talbot effect are also studied, and it is found that both parameters affect the formation of Talbot images.
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    Publication
    Techniques for the Compensation for Chromatic-Dispersion Effects in Fiber-Wireless Systems
    (Union radio-scientifique internationale, 2004-06) Hervé, D.; Corral González, Juan Luis; Fuster Escuder, José Miguel; Herrera Llorente, Javier; Martínez Abietar, Alejandro José; Polo Ramírez, Valentín; Ramos Pascual, Francisco; Vourc'h, E.; Martí Sendra, Javier; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Instituto Universitario de Tecnología Nanofotónica; Escuela Politécnica Superior de Gandia; Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica
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    Publication
    Liquid-liquid core-shell configurable mesoscale spherical acoustic lens with subwavelength focusing
    (Japan Society of Applied Physics, 2019) Pérez-López, Sergio; Candelas Valiente, Pilar; Fuster Escuder, José Miguel; Rubio Michavila, Constanza; Minin, Oleg V.; Minin, Igor V.; Departamento de Física Aplicada; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica; Escuela Técnica Superior de Ingeniería Agronómica y del Medio Natural; Agencia Estatal de Investigación; Ministerio de Economía y Competitividad; Universitat Politècnica de València
    [EN] In this work, we present a lens based on a thin hollow ABS spherical container structure, which can be filled up with different compatible liquids. The acoustic jet can be dynamically shaped by either shifting the operating frequency or modifying the geometry of the lens. We show for the first time that a spherical Ethanol ABS core¿shell acoustical lens immersed in water with low diameter-to-wavelength ratio equal to 6.67 and refraction index of 1.24 achieves a focusing spot narrower than 0.85¿. Experimental measurements validate simulation results and demonstrate the viability of these configurable spherical lenses in underwater acoustic focusing applications.
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    Publication
    On the Design of Soret Zone Plates based on Binary Sequences using Directional Transducers
    (MDPI AG, 2021-09) Candelas Valiente, Pilar; Pérez-López, Sergio; Fuster Escuder, José Miguel; Departamento de Física Aplicada; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica; GENERALITAT VALENCIANA; AGENCIA ESTATAL DE INVESTIGACION; UNIVERSIDAD POLITECNICA DE VALENCIA
    [EN] In this work, we analyze the effect of the distribution of transparent Fresnel regions over the focusing profile of Soret Zone Plates (SZP) based on binary sequences. It is shown that this effect becomes very significant in those fields where directional transducers are employed, such as microwaves or acoustics. A thorough analysis of both the SZP transmission efficiency and the focusing enhancement factor is presented. Moreover, experimental measurements are also carried out for a particular type of binary sequence, the Cantor ternary set, validating the theoretical model and demonstrating that the distribution of transparent Fresnel regions becomes a critical parameter in applications requiring directional emitters.
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    On the use of phase correction rings on Fresnel zone plates with ultrasound piston emitters
    (American Institute of Physics, 2018) Sergio Pérez-López; Fuster Escuder, José Miguel; Candelas Valiente, Pilar; Rubio Michavila, Constanza; Belmar Ibáñez, Francisco; Departamento de Física Aplicada; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica; Escuela Técnica Superior de Ingeniería Agronómica y del Medio Natural; Ministerio de Economía, Industria y Competitividad
    [EN] In this work, the distortion of the Fresnel Zone Plate focusing profile generated by a piston emitter in ultrasound applications is significantly reduced through the use of phase correction rings, which compensate the effect of the piston emitter radiation diagram. Both simulation and experimental results demonstrate the improvement achieved with this design method over the conventional case.
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    Publication
    Design of Binary-Sequence Zone Plates in High Wavelength Domains
    (MDPI AG, 2018) Fuster Escuder, José Miguel; Pérez-López, Sergio; Candelas Valiente, Pilar; Rubio Michavila, Constanza; Departamento de Física Aplicada; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica; Escuela Técnica Superior de Ingeniería Agronómica y del Medio Natural; Ministerio de Economía, Industria y Competitividad
    [EN] The design of zone plates is an important topic in many areas of physics, such as optics, X-rays, microwaves or ultrasonics. In this paper, a zone plate design method, which provides high flexibility in the shaping of the focusing profile, is analyzed. This flexibility is achieved through the use of binary sequences that produce zone plates with different properties and applications. It is shown that this binary-sequence method works properly at low wavelengths, but requires a modification term to work accurately in high wavelength domains. This additional term extends this powerful design method to any wavelength. Simulation results show acoustic focusing profiles for Fresnel, Fibonacci and Cantor zone plates operating at a wavelength of 1.5 mm without any distortion.
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    Publication
    On the focusing enhancement of Soret zone plates with ultrasound directional transducers
    (American Institute of Physics, 2019-06-03) Pérez-López, Sergio; Fuster Escuder, José Miguel; Candelas Valiente, Pilar; Rubio Michavila, Constanza; Departamento de Física Aplicada; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica; Escuela Técnica Superior de Ingeniería Agronómica y del Medio Natural; Agencia Estatal de Investigación; Ministerio de Economía y Empresa; Universitat Politècnica de València
    [EN] This work analyzes the influence of the distribution of transparent Fresnel regions over the focusing profile of Soret Zone Plates. It is shown that this effect becomes very significant in those fields where directional transducers are employed, such as microwaves or acoustics. A thorough analysis on both the lens transmission efficiency and the focusing enhancement factor is presented. Moreover, experimental measurements are also carried out, validating the theoretical model and demonstrating that the distribution of transparent Fresnel regions becomes a critical parameter in applications requiring directional emitters.
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    Publication
    Fractal lenses based on Cantor binary sequences for ultrasound focusing applications
    (Elsevier, 2019) Pérez-López, Sergio; Fuster Escuder, José Miguel; Candelas Valiente, Pilar; Rubio Michavila, Constanza; Departamento de Física Aplicada; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica; Escuela Técnica Superior de Ingeniería Agronómica y del Medio Natural; Agencia Estatal de Investigación; Ministerio de Economía y Competitividad
    [EN] In this work, we demonstrate the application of Cantor fractal lenses in acoustics. The Cantor Zone Plate (CZP), previously introduced in optics, is designed from a conventional Fresnel Zone Plate (FZP) using a binary sequence governed by the distribution of a generalized Cantor set. The CZP maintains its main focus at the same focal distance than its associated FZP, providing a softer multi-foci focusing profile which is very useful in certain ultrasound therapeutic applications. Experimental measurements are in good agreement with the theoretical model, demonstrating that CZPs are suitable for the ultrasound field.
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    Publication
    Práctica de Laboratorio: Ondas Guiadas
    (Universitat Politècnica de València, 2013-05-31) Bachiller Martin, Maria Carmen; Fuster Escuder, José Miguel; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Instituto Universitario de Telecomunicación y Aplicaciones Multimedia; Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica
    En este artículo se presenta un resumen de la teoría básica de Propagación de Ondas Guiadas. Es una práctica de aula, ya que el alumno no va a utilizar recursos de laboratorio si no sus propios recursos didácticos: apuntes de clase y libros. Esta práctica se puede trabajar de forma individual o en grupo, pero siempre de forma autónoma porque se pretende que el alumno se enfrente a la resolución de problemas complejos antes de asistir a los actos de evaluación de la asignatura. La colección de problemas se entregará a la entrada a la práctica y los alumnos deberán resolverla durante las dos horas de duración de la misma. La resolución de los problemas se publicará en Poliformat tras la práctica con la idea que el alumno puede autoevaluarse.