Exploració per autor "Tiana Alsina, Jordi"
Ara es mostren els items 1-20 de 46
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A wind-lidar buoy for offshore wind measurements: first commissioning test-phase results
Gutiérrez Antuñano, Miguel Ángel; Tiana Alsina, Jordi; Rocadenbosch Burillo, Francisco; Sospedra, Joaquim; Aghabi, Rajai; González Marco, Daniel (Institute of Electrical and Electronics Engineers (IEEE), 2017)
Comunicació de congrés
Accés restringit per política de l'editorialThis paper presents the development of a new commercial floating lidar system aimed to measure the wind resource and other environmental variables at candidate wind farm locations. This work describes this new lidar system ... -
Abrupt transition from low-coherence to high-coherence radiation in a semiconductor laser with optical feedback
Duque Gijón, María; Masoller Alonso, Cristina; Tiana Alsina, Jordi (2023-01-19)
Article
Accés obertSemiconductor lasers are very sensitive to optical feedback. Although it is well known that coherent feedback lowers the threshold of the laser, the characteristics of the transition from low-coherence radiation—dominated ... -
Atmospheric boundary layer height estimation using a Kalman filter and a frequency-modulated continuous-wave radar
Lange, Diego; Rocadenbosch Burillo, Francisco; Tiana Alsina, Jordi; Frasier, Steve (Institute of Electrical and Electronics Engineers (IEEE), 2015-06-01)
Article
Accés obertAn adaptive solution based on an Extended Kalman Filter (EKF) is proposed to estimate the Atmospheric Boundary-Layer Height (ABLH) from Frequency-Modulated Continuous-Wave (FMCW) S-band weather-radar returns. The EKF ... -
Atmospheric boundary layer height estimation using combined microwave radiometer and lidar data
Saeed, Umar; Tiana Alsina, Jordi; Crewell, Susanne; Rocadenbosch Burillo, Francisco (2014)
Comunicació de congrés
Accés restringit per política de l'editorialThe estimation of atmospheric boundary layer height (ABLH) during a full diurnal cycle using ground-based remote sensing instruments is one of the key challenges in atmospheric science. Most of these instruments such as ... -
Atmospheric boundary layer height monitoring using a kalman filter and backscatter lidar returns
Lange, Diego; Tiana Alsina, Jordi; Saeed, Umar; Tomás Martinez, Sergio; Rocadenbosch Burillo, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2014-08-01)
Article
Accés restringit per política de l'editorialA solution based on a Kalman filter to trace the evolution of the atmospheric boundary layer (ABL) sensed by a ground-based elastic-backscatter tropospheric lidar is presented. An erf-like profile is used to model the ... -
Characterization of speckle patterns generated by a semiconductor laser with optical feedback for speckle reduction in retinal imaging instruments
Halpaap, Donatus; Tiana Alsina, Jordi; Vilaseca Ricart, Meritxell; Masoller Alonso, Cristina (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2019)
Comunicació de congrés
Accés restringit per política de l'editorialWe study experimentally the operating conditions of a semiconductor laser diode subjected to different amounts of optical feedback in order to find a stable and cost-efficient solution for speckle reduction in double-pass ... -
Comparing the dynamics of periodically forced lasers and neurons
Tiana Alsina, Jordi; Quintero Quiroz, Carlos Alberto; Masoller Alonso, Cristina (2019-10-21)
Article
Accés obertNeuromorphic photonics is a new paradigm for ultra-fast neuro-inspired optical computing that canrevolutionize information processing and artificial intelligence systems. To implement practicalphotonic neural networks is ... -
Concept design of a multiwavelength aerosol lidar system with mitigated diattenuation effects and depolarization-measurement capability
Comerón Tejero, Adolfo; Sicard, Michaël; Vidal Calvo, Eric; Barragán Cuesta, Rubén; Muñoz Porcar, Constantino; Rodríguez Gómez, Alejandro Antonio; Tiana Alsina, Jordi; Rocadenbosch Burillo, Francisco; García Vizcaíno, David (EDP Sciences, 2016)
Comunicació de congrés
Accés obertIt is known that the retrieval of aerosol extinction and backscatter coefficients from lidar data acquired through so-called total-power channels – intended to measure the backscattered power irrespective of the polarization ... -
Distinguishing signatures of determinism and stochasticity in spiking complex systems
Aragoneses Aguado, Andrés; Rubido, Nicolás; Tiana Alsina, Jordi; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2013-05-07)
Article
Accés obert -
Dynamics of a semiconductor laser with feedback and modulation: experiments and model comparison
Tiana Alsina, Jordi; Masoller Alonso, Cristina (Optical Society of American (OSA), 2022-03-14)
Article
Accés obertWe study experimentally and numerically the dynamics of a semiconductor laser near threshold, subject to optical feedback and sinusoidal current modulation. The laser operates in the low frequency fluctuation (LFF) regime ... -
Estimation of the motion-induced horizontal-wind-speed standard deviation in an offshore doppler lidar
Gutiérrez Antuñano, Miguel Ángel; Tiana Alsina, Jordi; Salcedo Bosch, Andreu; Rocadenbosch Burillo, Francisco (Multidisciplinary Digital Publishing Institute (MDPI), 2018-12-14)
Article
Accés obertThis work presents a new methodology to estimate the motion-induced standard deviation and related turbulence intensity on the retrieved horizontal wind speed by means of the velocity-azimuth-display algorithm applied to ... -
Estimation of wave period from pitch and roll of a lidar buoy
Salcedo Bosch, Andreu; Rocadenbosch Burillo, Francisco; Gutiérrez Antuñano, Miguel Ángel; Tiana Alsina, Jordi (Multidisciplinary Digital Publishing Institute (MDPI), 2021-02-12)
Article
Accés obertThis work proposes a new wave-period estimation (L-dB) method based on the power-spectral-density (PSD) estimation of pitch and roll motional time series of a Doppler wind lidar buoy under the assumption of small angles ... -
Experimental and Numerical Study of Locking of Low-Frequency Fluctuations of a Semiconductor Laser with Optical Feedback
Tiana Alsina, Jordi; Masoller Alonso, Cristina (2022-02)
Article
Accés obertWe study the output of a semiconductor laser with optical feedback operated in the lowfrequency fluctuations (LFFs) regime and subject to weak sinusoidal current modulation. In the LFF regime, the laser intensity exhibits ... -
Experimental characterization of the speckle pattern at the output of a multimode optical fiber
Halpaap, Donatus; Tiana Alsina, Jordi; Vilaseca Ricart, Meritxell; Masoller Alonso, Cristina (2019-09-30)
Article
Accés obertSpeckle patterns produced by coherent waves interfering with each other are undesirable in many imaging applications (for example, in laser projection systems) but on the other hand, they contain useful information that ... -
Experimental characterization of the transition to coherence collapse in a semiconductor laser with optical feedback
Panozzo, M.; Quintero Quiroz, Carlos Alberto; Tiana Alsina, Jordi; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (Institute of Physics (IOP), 2017-11-01)
Article
Accés obertSemiconductor lasers with time-delayed optical feedback display a wide range of dynamical regimes, which have found various practical applications. They also provide excellent testbeds for data analysis tools for characterizing ... -
Experimental study of different LFF regimes in semiconductor lasers with an external cavity
Aragoneses Aguado, Andrés; Zamora Munt, Jordi; Tiana Alsina, Jordi; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2011)
Comunicació de congrés
Accés restringit per política de l'editorial -
Experimental study of modulation waveforms for entraining the spikes emitted by a semiconductor laser with optical feedback
Tiana Alsina, Jordi; Quintero Quiroz, Carlos Alberto; Panozzo, M.; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2018-04-02)
Article
Accés obertThe entrainment phenomenon, by which an oscillator adjusts its natural rhythm to an external periodic signal, has been observed in many natural systems. Recently, attention has focused on which are the optimal conditions ... -
Experimental study of spatial and temporal coherence in a laser diode with optical feedback
Duque Gijón, María; Tiana Alsina, Jordi; Masoller Alonso, Cristina (Optical Society of American (OSA), 2023-06-19)
Article
Accés obertOptical feedback can reduce the linewidth of a semiconductor laser by several orders of magnitude, but it can also cause line broadening. Although these effects on the temporal coherence of the laser are well known, a good ... -
Experimental study of speckle patterns generated by low-coherence semiconductor laser light
Halpaap Halpaap, Herbert Donatus; Marconi, Mathias; Yacomotti, Alejandro M.; Tiana Alsina, Jordi; Masoller Alonso, Cristina (Institute of Physics (IOP), 2020-06-01)
Article
Accés obertSpeckle is a wave interference phenomenon that has been studied in various fields, including optics, hydrodynamics, and acoustics. Speckle patterns contain spectral information of the interfering waves and of the scattering ... -
Experimental study of the neuron-like dynamics of a semiconductor laser with optical feedback and current modulation
Tiana Alsina, Jordi; Quintero Quiroz, Carlos Alberto; Masoller Alonso, Cristina (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2020)
Text en actes de congrés
Accés obertExcitable lasers that mimic neuronal activity can be building blocks of ultra-fast neuro-inspired information processing systems, which can revolutionize the fields of optical signal processing, optical computing and ...