Exploració per tema "Semiconductor lasers"

Ara es mostren els items 21-40 de 56

    • Exploiting the Nonlinear Dynamics of Optically Injected Semiconductor Lasers for Optical Sensing 

      Torre, Maria Susana; Masoller Alonso, Cristina (2019-06-01)
      Article
      Accés obert
      Optically injected semiconductor lasers are known to display a rich variety of dynamic behaviours, including the emission of excitable pulses, and of rare giant pulses (often referred to as optical rogue waves). Here, we ...

    • Forecasting the amplitude of high-intensity chaotic laser pulses 

      Amil, Pablo; Cornelles Soriano, Miguel; Masoller Alonso, Cristina (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2020)
      Text en actes de congrés
      Accés obert
      Forecasting the dynamics of chaotic systems from the analysis of their output signals is a challenging problem with applications in most fields of modern science. In this work, we use a laser model to compare the performance ...

    • Generation of extreme pulses on demand in semiconductor lasers with optical injection 

      Tian, Jin; Chen, Siyu; Masoller Alonso, Cristina (2017-12-11)
      Article
      Accés obert
      The generation of extreme intensity pulses in an optically injected semiconductor laser is studied numerically by using a well-known rate equation model. We show that step-up perturbations of the laser pump current can ...

    • Laser feedback interferometry with semiconductor lasers 

      García Gómez, Pablo (Universitat Politècnica de Catalunya, 2017-06)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   University of Queensland
      Laser Feedback Interferometry is based on the self-mixing effect. When light emitted from a laser reflects in a target and is reinjected into its cavity, the optical parameters of the laser change providing information ...

    • Locking phenomena in semiconductor lasers near threshold with optical feedback and sinusoidal current modulation 

      Tiana Alsina, Jordi; Masoller Alonso, Cristina (2021-09-01)
      Article
      Accés obert
      The dynamics of semiconductor lasers with optical feedback and current modulation has been extensively studied, and it is, by now, well known that the interplay of modulation and feedback can produce a rich variety of ...

    • Machine learning algorithms for predicting the amplitude of chaotic laser pulses 

      Amil Marletti, Pablo; Cornelles Soriano, Miguel; Masoller Alonso, Cristina (Institute of Physics (IOP), 2019-11-12)
      Article
      Accés obert
      Forecasting the dynamics of chaotic systems from the analysis of their output signals is a challenging problem with applications in most fields of modern science. In this work, we use a laser model to compare the performance ...

    • Modes in microchip lasers 

      Plukys, Matas; Gaizauskas, Eugenijus; Gailevicius, Darius; Staliunas, Kestutis (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The transverse modes in microchip lasers (MCL) appear different from the classical mode theory, as the resonator consists of a set of plane mirrors (similar to semiconductor edge-emitting lasers and VCSELs). Then the ...

    • Multidimensional subwavelength position sensing using a semiconductor laser with optical feedback 

      Cohen, Seth; Aragoneses Aguado, Andrés; Rontani, Damien; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina; Gauthier, Daniel (2013-11-01)
      Article
      Accés obert
      We demonstrate experimentally how to harness quasi-periodic dynamics in a semiconductor laser with dual optical feedback for measuring subwavelength changes in each arm of the cavity simultaneously. We exploit the ...

    • Non-Hermitian arrangement for stable semiconductor laser arrays 

      Botey Cumella, Muriel; Herrero Simon, Ramon; Medina Pardell, Judith; Staliunas, Kestutis (2021-06-16)
      Report de recerca
      Accés obert
      We propose and explore a physical mechanism for the stabilization of the complex spatiotemporal dynamics in arrays (bars) of broad area laser diodes taking advantage of the symmetry breaking in non-Hermitian potentials. ...

    • Non-Hermitian arrangement for stable semiconductor laser arrays 

      Medina Pardell, Judith; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis (2021-07-19)
      Article
      Accés obert
      We propose and explore a physical mechanism for the stabilization of the complex spatiotemporal dynamics in arrays (bars) of broad area laser diodes taking advantage of the symmetry breaking in non-Hermitian potentials. ...

    • Non-Hermitian broad aperture semiconductor lasers based on PT-symmetry 

      Botey Cumella, Muriel; Waseem Ahmed, Waqas; Medina Pardell, Judith; Herrero Simon, Ramon; Staliunas, Kestutis (2019)
      Text en actes de congrés
      Accés obert
      In this paper we propose a novel configuration to regularize the complex spatiotemporal dynamics of broad area lasers into bright light beam. It has recently been shown that arbitrary non-Hermitian optical potentials based ...

    • Non-Hermitian coupled semiconductor laser array 

      Herrero Simon, Ramon; Medina Pardell, Judith; Botey Cumella, Muriel; Staliunas, Kestutis (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
      Text en actes de congrés
      Accés obert
      We propose and explore a stabilization mechanism of a semiconductor laser array based on asymmetric coupling between neighboring lasers. The stabilization scheme takes advantage of the symmetry breaking of non-Hermitian ...

    • Non-Hermitian modulations for stabilization of VCSEL, EEL and EEL arrays 

      Herrero Simon, Ramon; Benadouda Ivars, Salim; Botey Cumella, Muriel; Staliunas, Kestutis (2023)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Semiconductor lasers and laser arrays emit temporally unstable and low spatial quality beams associated to intrinsic dynamical spatiotemporal instabilities. W e propose the simultaneous modulations of refractive index and ...

    • Optical power model of a laser bar diode 

      Borràs Cristòfol, Ramon; Río Fernandez, Joaquín del; Oriach, Carles; Juliachs, Jordi (Institute of Physics (IOP), 2018)
      Text en actes de congrés
      Accés obert
      This article proposes a modelling method for laser diodes optical output power including its dependency on temperature. The device used for this study is a 40 W Monocrom's diode, with 808 nm wavelength emitted light and ...

    • Patterning of WOx, VOx, and MoOx thin-films with picosecond and nanosecond laser sources 

      Muñoz García, Cristina; Canteli, David; Lauzurica, Sara; Morales Furio, Miguel; Molpeceres Alvarez, Carlos; Ros Costals, Eloi; Ortega Villasclaras, Pablo Rafael; López González, Juan Miguel; Voz Sánchez, Cristóbal (Elsevier, 2022)
      Text en actes de congrés
      Accés obert
      Transition metal oxide (TMOs) layers have interesting properties as selective contacts, i.e., hole or electron transport layers for novel semiconductor devices. Especially, oxides of molybdenum (MoO3), vanadium (V2O5), and ...

    • Permutation entropy-based characterization of speckle patterns generated by semiconductor laser light 

      Tirabassi, Giulio; Duque Gijón, María; Tiana Alsina, Jordi; Masoller Alonso, Cristina (2023-12)
      Article
      Accés obert
      Semiconductor lasers with optical feedback are stochastic nonlinear systems that can display complex dynamics and abrupt changes when their operation conditions change. Even very small changes can lead to large variations ...

    • Perspective of remote optical measurement techniques 

      Gregorio, Eduard; Rocadenbosch Burillo, Francisco (2007)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This article presents an intercomparison between four different ROMTs: differential optical absorption spectroscopy (DOAS), differential absorption LIDAR (DIAL), Fourier transform infrared spectroscopy (FTIR), and tunable ...

    • Phase Diffusion effects in InP semiconductor lasers 

      Martínez Pàmias, Berta (Universitat Politècnica de Catalunya, 2022-09-06)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat

    • Phase locked harmonic generation in the opaque region of GaAs 

      Cojocaru, Crina; Rodríguez Suñé, Laura; Escalora, M.; Trull Silvestre, José Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Text en actes de congrés
      Accés obert
      We demonstrate second and third harmonic generation from a GaAs substrate, well-below the absorption edge, in both transmission and reflection geometries. The pump is tuned at 1064 nm, in the transparency range, while the ...

    • Photonic crystal spatial filtering in broad aperture diode laser 

      Gawali, Sandeep Babu; Gailevicius, Darius; Garre Werner, Guillermo; Purlys, Vytautas; Cojocaru, Crina; Trull Silvestre, José Francisco; Montiel Ponsoda, Joan; Staliunas, Kestutis (2019-10-02)
      Article
      Accés obert
      Broad aperture semiconductor lasers usually suffer from low spatial quality of the emitted beams. Due to the highly compact character of such lasers, the use of conventional intracavity spatial filters is problematic. We ...