Browsing by Subject "Làsers"

Now showing items 1-20 of 174

    • 3D car detection with LIDAR 

      Fernandez López, Christian (Universitat Politècnica de Catalunya, 2019-06)
      Bachelor thesis
      Open Access
      Covenantee:   Ficosa Electronics
      En esta tesis se propone entrenar una red neuronal para la detección de coches, utilizando sólo puntos de un LIDAR de 32 canales de la base de datos de NuScenes. El objetivo es conseguir el reconocimiento de coches frontales ...

    • El 50 aniversari del Làser: fites aconseguides en ciència i tecnologia, i perspectives de futur 

      Vilaseca Alavedra, Ramon (2010-05-07)
      Audiovisual
      Open Access
      Un làser és un dispositiu que utilitza l'emissió estimulada o induïda per generar un feix de llum. Però què ha fet fins ara i quin és el seu futur?

    • A 461 nm laser system for an ultracold strontium quantum gas experiment 

      Estarellas Perales, Antonio (Universitat Politècnica de Catalunya, 2021-09-09)
      Master thesis
      Open Access
      Covenantee:   Institut de Ciències Fotòniques (ICFO)
      In recent years, ultra-cold atomic gases have emerged as a novel platform for the study of quantum many-body systems. Exploiting these gases, it is possible to synthesize quantum matter of highly controllable properties ...

    • Activitats del grup de recerca Dinàmica No lineal, Òptica no lineal i Làsers 

      Vilaseca Alavedra, Ramon (Campus de Terrassa de la UPC, 2013-06-13)
      Conference report
      Open Access

    • Adaptive Filter Solution For Processing Lidar Returns: Optical Parameter Estimation 

      Rocadenbosch Burillo, Francisco; Vázquez Grau, Gregorio; Comerón Tejero, Adolfo (OPTICAL SOC AMER, 1998-01-31)
      Article
      Open Access
      Joint estimation of extinction and backscatter simulated profiles from elastic-backscatter lidar return signals is tackled by means of an extended Kalman filter (EKF). First, we introduced the issue from a theoretical point ...

    • Analysis of beam wander effects for a horizontal-path propagating Gaussian-beam wave: focused beam case 

      Recolons Martos, Jaume; Andrews, L.C.; Phillips, R.L. (SPIE-INT SOCIETY OPTICAL ENGINEERING, 2007-08-31)
      Article
      Open Access
      Failure of the first-order Rytov approximation to properly predict the scintillation index of a large-aperture focused beam, or an uplink collimated (or focused) beam, has been discussed in several recent publications, ...

    • Análisis de la rugosidad de una superficie utilizando speckle 

      Gómez Mieras, María Del Coral (Universitat Politècnica de Catalunya, 2016-06-03)
      Bachelor thesis
      Open Access
      La rugosidad de la superficie del papel es un parámetro sumamente importante en la fabricación del papel. La medida de rugosidad de la superficie es uno de los problemas centrales en la industria del papel. Actualmente, ...

    • Aplicación de la espectroscopia Raman a mezclas de pigmentos vía temperatura 

      Massip Álvarez, Sergio (Universitat Politècnica de Catalunya, 2016-01-29)
      Master thesis (pre-Bologna period)
      Open Access
      In this research, Raman spectroscopy was applied in order to study the temperature induced by a laser on a material. Firstly, the mathematical profile of a Raman spectrum was described, which is a useful procedure to ...

    • Arduino based laser control 

      Bernal Muñoz, Ferran (Universitat Politècnica de Catalunya, 2015-01)
      Bachelor thesis
      Open Access
      [ANGLÈS] Diode laser for communications control based on an Arduino board. Temperature control implementation. Software and hardware protection for the laser implementation.

    • Area and laser power scalability analysis in photonic networks-on-chip 

      Abadal Cavallé, Sergi; Cabellos Aparicio, Alberto; Lázaro Villa, José Antonio; Nemirovsky, Mario; Alarcón Cot, Eduardo José; Solé Pareta, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference lecture
      Restricted access - publisher's policy
      In the last decade, the field of microprocessor architecture has seen the rise of multicore processors, which consist of the interconnection of a set of independent processing units or cores in the same chip. As the number ...

    • Assimilation of lidar signals: application to aerosol forecasting in the western Mediterranean basin 

      Wang, Y; Sartelet, K. N.; Bocquet, M.; Sicard, Michaël; Comerón Tejero, Adolfo; García Vizcaíno, David; Muñoz Porcar, Constantino; Rocadenbosch Burillo, Francisco (2014-11-17)
      Article
      Open Access
      This paper presents a new application of assimilating lidar signals to aerosol forecasting. It aims at investigating the impact of a ground-based lidar network on the analysis and short-term forecasts of aerosols through ...

    • Auscultación de la erosión en un terraplén experimental mediante la tecnología escáner láser terrestre 

      Suárez Matarrita, Carolina María (Universitat Politècnica de Catalunya, 2019-07)
      Master thesis
      Open Access
      La erosión y perdida de suelo es un fenómeno con consecuencias importantes. En este trabajo se estudia la erosión en un terraplén experimental mediante la aplicación de tecnología escáner láser terrestre (TLS). Se realizará ...

    • Automatic compensation of polarisation drifts in an optical fibre 

      Cichy Cusi, Simon (Universitat Politècnica de Catalunya, 2020-06)
      Bachelor thesis
      Open Access
      In days where Science Fiction uses the word ?Quantum? to justify any weird phenomena, we are actually on the edge of the Second Quantum Revolution. The ability to harness the potential of the quantum state of single particles ...

    • Automatic manhole extraction from MMS data to update basemaps 

      Alshaiba, Omar; Núñez Andrés, María Amparo; Lantada, Nieves (2020)
      Article
      Open Access
      Basemaps are the main resource used in urban planning, building and infrastructure asset management. Therefore, they must be accurate and up to date to better serve citizens, contractors, property owners and town planning ...

    • Automatización de medidas de potencia de un láser 

      Perez Ramos, Juan Carlos (Universitat Politècnica de Catalunya, 2018-10)
      Bachelor thesis
      Open Access
      This project is about the automation of power measurements of a laser to have control at all times of its status and operation.

    • Avalanche of stimulated forward scattering in high harmonic generation 

      Serrat Jurado, Carles; Roca, David; Budesca, Josep M.; Seres, Jozsef; Seres, Enikoe; Aurand, Bastian; Hoffmann, Andreas; Namba, Shinichi; Kuehl, Thomas; Spielmann, Christian (2016-04-05)
      Article
      Open Access
      Optical amplifiers in all ranges of the electromagnetic spectrum exhibit an essential characteristic, namely the input signal during the propagation in the amplifier medium is multiplied by the avalanche effect of the ...

    • Beam focalization in reflection from flat dielectric subwavelength gratings 

      Cheng, Yu Chieh; Zeng, H; Trullàs Simó, Joaquim; Cojocaru, Crina; Malinauskas, Mangirdas; Jukna, T; Wiersma, D.S.; Staliunas, Kestutis (2014-10-15)
      Article
      Restricted access - publisher's policy
      We experimentally demonstrate the recently predicted effect of near-field focusing for light beams from flat dielectric subwavelength gratings (SWGs). This SWGs were designed for visible light 532 nm and fabricated by ...

    • Brightness enhancement in Non-Hermintian VCSELs 

      Waseem Ahmed, Waqas; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis (Optical Society of American (OSA), 2019)
      Conference report
      Restricted access - publisher's policy
      Vertical Cavity Surface Emitting lasers (VCSELs) are compact and efficient light sources useful for a variety of applications. However, due to lack of a transverse mode control mechanism, such lasers suffer from poor spatial ...

    • Calibration of Raman lidar water vapor mixing ratio measurements using zenithal measurements of diffuse sunlight and a radiative transfer model 

      Muñoz Porcar, Constantino; Comerón Tejero, Adolfo; Sicard, Michaël; Barragán Cuesta, Rubén; García Vizcaíno, David; Rodríguez Gómez, Alejandro Antonio; Rocadenbosch Burillo, Francisco; Granados Muñoz, María José (Institute of Electrical and Electronics Engineers (IEEE), 2018-07-20)
      Article
      Open Access
      Among the different techniques available for measuring the atmospheric water vapor content, Raman lidars stand out as accurate instruments providing detailed profiles with high temporal and altitude resolution. Their ...

    • Caracterización de diodos láser tipo Distributed Feedback 

      Guzman Torres, Carlos (Universitat Politècnica de Catalunya, 2011-06-30)
      Bachelor thesis
      Open Access