Recent Submissions

  • Are the spikes emitted by a semiconductor laser with feedback similar to neuronal spikes? 

    Quintero Quiroz, Carlos Alberto; Amaral Sorrentino, Taciano; Aragoneses, Andrés; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2017)
    Conference report
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    We study experimentally a semiconductor laser operating in a feedback-induced regime known as low frequency fluctuations (LFFs), in which the laser emits a spiking output that resembles the spikes of biological neurons. ...
  • 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)
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    This 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 ...
  • Simulations and analysis of beam quality improvement in spatially modulated broad area edge-emitting devices 

    Radziunas, Mindaugas; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2014)
    Conference report
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    We simulate and analyze how beam quality improves while being amplified in edge emitting broad area semiconductor amplifiers with a periodic structuring of the electrical contacts, in both longitudinal and lateral directions. ...
  • 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)
    Conference lecture
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  • Transverse cross-correlation scheme for pulse shape measurement in random nonlinear crystals 

    Cojocaru, Crina; Wang, Bingxia; Trull Silvestre, José Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
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    We present a novel single-shot cross-correlation scheme based on the measurement of the transverse second harmonic generation (TSHG) in crystals with randomly distributed nonlinear ferroelectric domains. We implement it ...
  • The role of the phase locking phenomenon in the second and third harmonics cavity localization 

    Roppo, Vito; Cojocaru, Crina; D'Agunaro, G.; Ranieri, F.; Raj, R.; Trull Silvestre, José Francisco; Vilaseca Alavedra, Ramon; Scalora, M. (2009)
    Conference report
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    We theoretically and experimentally study how the phase-locking mechanism changes effective dispersion of the medium at the harmonic frequencies making them become localized inside a opaque cavity designed to be resonant ...
  • The effect of domain distribution on second harmonic generation in disordered nonlinear media 

    Roppo, Vito; Saltiel, Salomon M.; Wang, W.; Kalinowski, K.; Trull Silvestre, José Francisco; Cojocaru, Crina; Neshev, Dragomir N.; Krolikowski, Wieslaw; Vilaseca Alavedra, Ramon; Staliunas, Kestutis; Kivshar, Yu. (2009)
    Conference report
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    We study theoretically and experimentally the second harmonic generation in nonlinear crystals with random distribution of ferroelectric domains. We show that the specific features of disordered domain structure greatly ...
  • Phase locked second harmonic etalon localization 

    Roppo, Vito; D'Aguanno, G.; Cojocaru, Crina; Raineri, F.; Trull Silvestre, José Francisco; Vilaseca Alavedra, Ramon; Raj, R; Scalora, M. (2009)
    Conference report
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    During the last decades a phase locking phenomenon has been observed for second harmonic (SH) generation but only recently it was recognized as such in systematic studies. The general solution of the SHG from a linear/nonlinear ...
  • Second-harmonic generation in disordered quadratic media: role of a ferroelectric domain structure 

    Roppo, Vito; Kalinowski, K.; Wang, W.; Cojocaru, Crina; Trull Silvestre, José Francisco; Vilaseca Alavedra, Ramon; Scalora, M.; Krolikowski, Wieslaw; Kivshar, Yu. (2010)
    Conference report
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    Naturally grown ferroelectric crystals such as Strontium Barium Niobate (SBN) often exhibit an irregular multidomain structure with rod-like domains [1]. These disordered nonlinear quadratic crystals have attracted a ...
  • Second and third harmonic generation in disordered quadratic nonlinear media: application to short-pulse characterization 

    Roppo, Vito; Wang, W.; Kalinowski, K.; Vilaseca Alavedra, Ramon; Trull Silvestre, José Francisco; Cojocaru, Crina; Staliunas, Kestutis; Krolikowski, Wieslaw; Kivshar, Yu. (2010)
    Conference report
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    We study parametric frequency conversion in quadratic nonlinear media with disordered ferroelectric domains. We demonstrate that disorder allows realizing broadband second- and third-harmonic generation via cascading of ...
  • Broadband third harmonic generation in quadratic media with disordered ferroelectric domains 

    Kalinowski, K.; Roppo, Vito; Wang, W.; Neshev, Dragomir N.; Kong, Y.; Cojocaru, Crina; Trull Silvestre, José Francisco; Vilaseca Alavedra, Ramon; Staliunas, Kestutis; Krolikowski, Wieslaw; Kivshar, Yu. (2010)
    Conference report
    Restricted access - publisher's policy
    We study nonlinear frequency generation in media with random ferroelectric domain structure. We show that randomness enables one to realize broadband third harmonic generation via cascading of two second order quasi-phase ...
  • Second-harmonic generation in disordered quadratic media: role of a ferroelectric domain structure 

    Roppo, Vito; Kalinowski, K.; Wang, W.; Cojocaru, Crina; Trull Silvestre, José Francisco; Vilaseca Alavedra, Ramon; Scalora, M.; Krolikowski, Wieslaw; Kivshar, Yu. (2010)
    Conference report
    Open Access
    We study theoretically the second harmonic generation in a nonlinear quadratic crystal with random distribution of ferroelectric domains. We show that the specific features of disordered domain structure greatly affect the ...

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