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Browsing by Subject "Microwave photonics"

Now showing items 1-20 of 57

A photonic microwave filter based on an asymmetric silicon Mach-Zehnder modulator

Gutiérrez Campo, Ana María; Sanchis Kilders, Pablo; Brimont, Antoine Christian Jacques; Thomson, David J.; Gardes, Frédéric Y.; Reed, Graham T.; Fédéli, Jean Marc; Vidal Rodriguez, Borja (Institute of Electrical and Electronics Engineers (IEEE), 2013-08)

[EN] A new approach for implementing an integrable photonic microwave filter based on exploiting the asymmetry of a CMOS-compatible silicon Mach-Zehnder modulator is demonstrated. The strong dependence of the modulator ...
Advanced RF Interferometry Structure for Improving Operation Range

Benítez-González, Jesús; Mora Almerich, José (Institute of Electrical and Electronics Engineers, 2018)

[EN] In this letter, a novel structure combining low coherence interferometry (LCI) and microwave photonics (MWP) is proposed. In this case, the electro-optic modulator is strategically placed inside the interferometric ...
Analysis and experimental characterization of silicon Mach-Zehnder Modulators for the transmission of radio signals (Análisis y caracterización experimental de moduladores Mach-Zehnder en silicio para la transmisión de señales de radio.)

Belio Apaolaza, Íñigo Francisco (Universitat Politècnica de València, 2021-10-11)

[ES] "Silicon-on-insulator", o silicio sobre aislante, se ha posicionado como una de las plataformas más prometedoras para circuitos integrados en fotónica de microondas, incluyendo moduladores ópticos. La compatibilidad ...
Analytical Model for Hybrid Amplitude and Phase Modulation in Dispersive Radio over Fiber Links

Vidal Rodriguez, Borja (Elsevier, 2011-10-01)

A general model of analog microwave photonic links employing cascaded amplitude and phase external modulation is theoretically derived. Chromatic dispersion is also included in the model showing a different dispersion ...
Apodized Coupled Resonator Optical Waveguides: Theory, design and characterization

Doménech Gómez, José David (Universitat Politècnica de València, 2013-09-23)

In this work we propose the apodization or windowing of the coupling coefficients of the unit cells conforming a coupled resonator device as a mean to reduce the level of secondary sidelobes in the case of SCISSOR configuration ...
Application of slow and fast light effects to microwave photonics

Gasulla Mestre, Ivana; Capmany Francoy, José; Sancho Durá, Juan; Lloret Soler, Juan Antonio; Sales Maicas, Salvador (Sociedad Española de Óptica, 2011)

[EN] We present a comprehensive review of the application of slow and fast light techniques to the field of microwave photonics. Basic principles leading to the implementation of key desired functionalities as tunable ...
Bidirectional WDM-OOFDM access network based on a sliceable optical transceiver with colorless ONUs

Sekkiou, Imene; Chicharro López, Francisco Israel; Ortega Tamarit, Beatriz; Mora Almerich, José (Elsevier, 2018)

[EN] A WDM OOFDM access network using a centralized optical transceiver based on a single optical broadband sliced source at the Central Office is presented as a low cost solution. Such network offers downlink and uplink ...
Brillouin Microwave Filter with enhanced Skirt Selectivity using a Birefringent Fiber

Samaniego, Diego; Vidal Rodriguez, Borja (Institute of Electrical and Electronics Engineers, 2019-03-15)

[EN] A technique to enhance the slope of a photonic microwave filter based on the stimulated Brillouin scattering is proposed. It relies on exploiting the polarization dependence of Brillouin gain in birefringent fibers. ...
Broadband photonic microwave noise sources

Vidal Rodriguez, Borja (Institute of Electrical and Electronics Engineers, 2020-05-05)

[EN] The generation of wideband microwave white noise based on optical technology is investigated. It is shown that strong broadband noise in the microwave band can be generated using amplified spontaneous noise (ASE). ...
Caracterización de un sistema de generación fotónica de señales de banda G

Peris Cuesta, Guillem (Universitat Politècnica de València, 2019-10-09)

[ES] El aumento de tráfico de datos en la red en los próximos años requerirá de unos parámetros que la actual tecnología no va a poder cumplir. La región de sub-THz es una zona del espectro aún por explotar donde los anchos ...
Cascaded Four-Wave Mixing for Microwave Photonic Harmonic Multiplication

Vidal Rodriguez, Borja; Bockelt, Alexander Stefan; Palací López, Jesús (Institute of Electrical and Electronics Engineers (IEEE), 2013-01-01)

Enhanced multiple four-wave mixing (FWM) processes in nonlinear fiber by phase modulation of the pump carrier are investigated for harmonic mixing multiplication of microwave signals. The enhancement of cascaded FWM by ...
Conditional frequency-domain beamsplitters using phase modulators

Capmany Francoy, José; Fernández-Pousa, Carlos R. (Institute of Electrical and Electronics Engineers (IEEE), 2011-10)

We propose and explore the families of fully tunable, conditional 2 x 2 frequency-domain beamsplitters that result from sideband coupling in phase modulators. Full tunability is obtained by tailoring the driving voltage ...
Design of optical fiber sensors and interrogation schemes

Sartiano, Demetrio (Universitat Politècnica de València, 2021-02-15)

[ES] Las fibras ópticas son dispositivos muy utilizados en el campo de las telecomunicaciones desde su descubrimiento. En las últimas décadas, las fibras ópticas comenzaron a utilizarse como sensores fotónicos. Los primeros ...
Diseño de redes de acceso ópticas para comunicaciones 5G basadas en la generación fotónica de las señales de onda milimétrica

Gonzálvez Raga, Borja (Universitat Politècnica de València, 2021-10-11)

[ES] El proyecto consiste en comprender la arquitectura y tecnologías empleadas en las redes ópticas de acceso radio centralizadas (C-RAN) para comunicaciones 5G. Se utilizará la técnica fotónica basada en modulación ...
Dispersion supported BB84 quantum key distribution using phase modulated light

Mora Almerich, José; Ruiz Alba Gaya, Antonio; Amaya Ocampo, Waldimar Alexander; Capmany Francoy, José (Institute of Electrical and Electronics Engineers (IEEE), 2011-06)

We propose and experimentally demonstrate that, contrary to what was thought up to now, an efficient BB84 operation is feasible using the double phase modulator (PMPM) configuration in frequency-coded quantum key distribution ...
EAM-SOA millimeter-wave frequency up-converter for radio-over-fiber applications

Palací López, Jesús; Villanueva Ibáñez, Guillermo Eduardo; Herrera, J. (Elsevier, 2011-01-01)

[EN] We present an optical scheme for photonic frequency up-conversion at the millimeter-wave bands based on Semiconductor Optical Amplifier. The proposed scheme modulates the bias current with the Intermediate Frequency ...
Estudio y diseño de arquitecturas de moduladores ópticos para comunicaciones analógicas en fotónica de silicio

Belio Apaolaza, Íñigo Francisco (Universitat Politècnica de València, 2021-10-11)

[ES] El modulador óptico integrado es un componente fundamental en cualquier sistema moderno de radio sobre fibra, ya que tiene una gran influencia en la distorsión que experimenta la señal radio transmitida. "Silicon-on ...
Experimental photonic generation of chirped pulses using nonlinear dispersion-based incoherent processing

Rius Mercado, Manuel; Bolea Boluda, Mario; Mora Almerich, José; Ortega Tamarit, Beatriz; Capmany Francoy, José (Optical Society of America: Open Access Journals, 2015-05-18)

We experimentally demonstrate, for the first time, a chirped microwave pulses generator based on the processing of an incoherent optical signal by means of a nonlinear dispersive element. Different capabilities have been ...
Fast Incoherent OFDR Interrogation of FBG Arrays Using Sparse Radio Frequency Responses

Clement, J.; Hervás-Peralta, Javier; Madrigal-Madrigal, Javier; Maestre, H; Torregrosa, G.; Fernandez-Pousa, Carlos R.; Sales Maicas, Salvador (Institute of Electrical and Electronics Engineers, 2018-10-01)

[EN] We present two implementations of fast, discrete incoherent optical frequency-domain reflectometers (I-OFDR) for the interrogation of equally spaced fiber Bragg grating (FBG) arrays, based on the determination of the ...
Fiber Wireless Transmission of 8.3-Gb/s/ch QPSK-OFDM Signals in 75-110-GHz Band

Deng, Lei; Beltrán Ramírez, Marta; Pang, Xiaodan; Zhang, Xu; Arlunno, Valeria; Zhao, Ying; Caballero, Antonio; Dogadaev, Anton; Yu, Xianbin; Llorente Sáez, Roberto; Liu, Deming; Monroy, Idelfonso Tafur (Institute of Electrical and Electronics Engineers (IEEE), 2012-03)

[EN] In this letter, we present a scalable high-speed W-band (75-110-GHz) fiber wireless communication system. By using an optical frequency comb generator, three-channel 8.3-Gb/s/ch optical orthogonal frequency-division ...