Exploració per autor "Santos Blanco, M. Concepción"
Ara es mostren els items 7-26 de 40
-
Bandgap widening in macroporous silicon photonic crystals by multiperiodic structures
(Institute of Physics (IOP), 2018-05-14)
Article
Accés obertLarge bandgaps with low transmission in 3D macroporous silicon photonic crystals have been proved as an interesting technology for the development of optical filters and spectroscopic MIR gas sensors. The aim of this study ... -
Bandwidth-length trade-off figures of merit for electro-optic traveling wave modulators
(2013-05)
Article
Accés obertClosed-form expressions explicitly relating modulation bandwidth and active length in electro-optic traveling wave modulators are presented which fully account for skin-effect electrode loss and optical-electrical wave ... -
Characterization of THz radiation by collimated wavefront aperture raster scanning
(Universidad de Málaga, 2020)
Text en actes de congrés
Accés obertWe present measurements for characterization of the beam profile and polarization pattern of lens-coupled photoconductive antennas (PCAs) at THz frequencies using a setup with antennas at fixed positions and a movable ... -
Closed-form expressions for the optimization of high speed electro-optical modulators
(2013-07)
Article
Accés restringit per política de l'editorialCompact closed-form mathematical expressions for the propagation parameters (characteristic impedance, effective permittivity and attenuation) of coplanar waveguides (CPW) are presented. The formulas take into account ... -
Compact closed-form expressions for the propagation parameters of a finite ground width coplanar transmission waveguide with thick electrodes
(2012-02-21)
Article
Accés restringit per política de l'editorialCompact closed-form mathematical expressions are presented for the effective permittivity, characteristic impedance and attenuation constant of coplanar waveguides with thick electrodes and high-frequency dispersion. ... -
Conmutacion totalmente optica de ondas guiadas en medios virefring.
(1993)
Text en actes de congrés
Accés obertA new kind of tunable all-optical guided-wave thresholding device using waveguides consisting of both birefringent linear media and isotropic nonlinear media is discussed. The behavior of the lower threshold with a suitable ... -
Differential link-loss compensation through dynamic bandwidth assignment in statistical OFDMA-PON
(2013)
Text en actes de congrés
Accés restringit per política de l'editorialFlexible bandwidth allocation strategies in a statistical OFDM-PON are experimentally shown to compensate for differential link loss allowing for proper detection of ONUs separated up to 55km (11.4dB) -
Direct connection of uni-traveling-carrier photodiodes to antennas for frequency reconfigurable fiber-radio transmission in the Ka band
(2024-07-01)
Article
Accés obertA compact photonically-driven wireless emitter based on a Uni-Traveling-Carrier photodiode (UTC-PD) which directly connects to a short asymmetrical inductive dipole (SAID) antenna is presented. The design exploits the ... -
Dynamic Y-branched structures in quadratic nonlinear media
(ELSEVIER SCIENCE BV, 2000-06-30)
Article
Accés obertA selfsplitting of the beams entering a waveguide made of a quadratic nonlinear material is observed numerically. Relative π phase differences between harmonics as positively contributing to linear diffraction are shown ... -
Experimental demonstration of a statistical OFDM-PON with multiband ONUs and elastic bandwidth allocation
(Institute of Electrical and Electronics Engineers (IEEE), 2015-01-01)
Article
Accés obertThe statistical orthogonal frequency division multiplexing passive optical network (OFDM-PON) concept with multiband optical network units (ONUs) is experimentally tested with two users and an optical line terminal at 2.5/5 ... -
Experimental demonstration of multi-band upstream in statistical OFDM-PONs and comparison with digital subcarrier assignment
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialA multiband subcarrier allocation scheme is demonstrated for the uplink in a statistical OFDM-PON. Performance achieved is similar to digital subcarrier allocation, with the significant advantage of a lower transmitter complexity. -
Figure of merit for multiband antennas
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-11-30)
Article
Accés obertThis communication defines a figure of merit for multiband antennas that gives an objective quantification of the similarities between radiation patterns at the different antenna operating bands. -
General Equations for the Induced Phase Shift in Resonant Electro-Optic Modulators
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-02-28)
Article
Accés obertWe derive general equations to calculate the electrooptically induced optical phase shift in resonantly enhanced modulators. The equations are useful in designing modulator electrodes with optimal length and optimal mismatch ... -
Impact of bias field screening and dipole length in terahertz photoconductive antennas
(Institute of Electrical and Electronics Engineers (IEEE), 2022)
Text en actes de congrés
Accés restringit per política de l'editorialA numerical approach for the modelling of dipole Photoconductive Antennas (PCAs) is presented, based on the classical Drude model with extension to include the bias field screening due to both the space charge and the THz ... -
La fotònica revoluciona les telecomunicacions
(1998-12)
Article
Accés obert -
Laser linewidth requirements for remote heterodyne OFDM based PON scenario
(IEEE Press and Wiley, 2004)
Text en actes de congrés
Accés restringit per política de l'editorialThe relationship between the FFT size, modulation format and laser linewidth is studied in a remote heterodyne scenario where phase noise is compensated by pilot tones. Results indicate that the laser linewidth tolerance ... -
New modulation zero-shift method to characterize fast group delay ripple of dispersion-compensating fiber Bragg gratings
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-09-30)
Article
Accés obertAn upgrade to standard modulation phase-shift method is shown to improve accuracy through electrical scan of the optical spectrum. Experiments have allowed the capture of fast group delay ripple of a dispersion-compensating ... -
Numerical investigation of the bias-path model for the photocurrent in photoconductive antennas
(Institute of Electrical and Electronics Engineers (IEEE), 2022)
Text en actes de congrés
Accés restringit per política de l'editorialNumerical results on the implementation of a computationally efficient algorithm for finding the instantaneous photocurrent across the gap volume in Photoconductive antennas (PCAs) through solution of one-dimensional (1D) ... -
OFDM-PON performance with limited quantization
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialA study of digital-analogue converter quantization effects and the minimum resolution required in an OFDMA-PON is carried out with 10 Gbps transceivers. The PON is based on DD over a maximum of 100 km fibre length. Results ... -
Optical beam steering network with multiband capability
(Universidad de Málaga, 2020)
Text en actes de congrés
Accés obertA multiwavelength (MW) optical true time delay Network (OTTDN) to feed a phased array antenna (PAA) is presented. Beam steering capabilities can be demonstrated when applying MW tuning. A Dual Electrode Mach Zehnder Modulator ...
