Now showing items 1-15 of 15

  • A simple method to generate optical beams with a screw phase dislocation 

    Petrov, D V; Canal Bienzobas, Fernando; Torner Sabata, Lluís (1997-09)
    Article
    Restricted access - publisher's policy
    In this work, it is shown experimentally that optical beams that contain a phase dislocation can be generated with a laser oscillating in the fundamental mode and a cylindrical-lens mode converter.
  • Azimuthal instabilities and self-breaking of beams into sets of solitons in bulk second-harmonic generation 

    Torner Sabata, Lluís; Petrov, D V (Institution of Electrical Engineers, 1997-03)
    Article
    Open Access
    Optical harmonic generation
  • Controllable patterns of parametric solitons 

    Minardi, S; Molina Terriza, Gabriel; Bramati, A; Ditrapani, P; Torner Sabata, Lluís; Pérez Torres, Juan; Petrov, D V; Soto-Crespo, J M (2001-12)
    Article
    Restricted access - publisher's policy
  • Deflection of quadratic solitons at edge dislocations 

    Petrov, D V; Carrasco Rodríguez, Sílvia; Molina Terriza, Gabriel; Torner Sabata, Lluís (2003-08)
    Article
    Restricted access - publisher's policy
    We report the observation of deflection of optical solitons generated in the frequency doubling of light beams containing edgelike topological amplitude and phase dislocations. The angular deflection of the solitons was ...
  • From topological charge information to sets of solitons in quadratric nonlinear media 

    Torner Sabata, Lluís; Pérez Torres, Juan; Petrov, D V; Soto-Crespo, J M (1998-10)
    Article
    Restricted access - publisher's policy
    We describe the principle of operation of a new class of optical devices operating in quadratic non-linear media that mix wave front topological charge dislocations nested in focused light beams and produce certain patterns ...
  • Observation of self-trapping of light in walk-off compensating tandems 

    Carrasco Rodríguez, Sílvia; Petrov, D V; Pérez Torres, Juan; Torner Sabata, Lluís; Kim, H; Stegeman, G I; Zondy, J J (2004-02)
    Article
    Restricted access - publisher's policy
    We report the first experimental observation, to our knowledge, of the self-trapping of light in walk-off-compensating optical tandems. The experiment was conducted with picosecond light pulses in a ten-plate optically ...
  • Observation of the orbital angular momentum spectrum of a light beam 

    Vasnetsov, M V; Pérez Torres, Juan; Petrov, D V; Torner Sabata, Lluís (2003-12)
    Article
    Restricted access - publisher's policy
    We demonstrate an experimental scheme that allows the elucidation of the orbital angular momentum discrete spectrum of an arbitrary light signal. The orbital angular momentum spectrum is represented in a Laguerre–Gaussian ...
  • Observation of topological charge pair nucleation in parametric wave mixing 

    Petrov, D V; Torner Sabata, Lluís (1998-12)
    Article
    Restricted access - publisher's policy
    We report the observation of the nucleation of pairs of screw dislocations of opposite topological charges in second-harmonic generation processes in quadratic nonlinear media. The observation provides evidence about the ...
  • Optical vortex streets 

    Molina Terriza, Gabriel; Petrov, D V; Torner Sabata, Lluís (2002-12)
    Article
    Restricted access - publisher's policy
  • Rotura de haces opticos con dislocaciones de fase y formacion de solitones en medios no lineales cuadraticos 

    Petrov, D V; Torner Sabata, Lluís; Santos, M C (1997-06)
    Article
    Open Access
  • Second-harmonic generation by intense beams containing phase dislocations:self-breaking into sets of solitons 

    Petrov, D V; Torner Sabata, Lluís (1997-12)
    Article
    Restricted access - publisher's policy
    Second-harmonic generation of light in bulk quadratic non-linear media with intense input beams containing phase dislocations is studied numerically under conditions for TypeI phase-matching. We investigate how, above a ...
  • Solitary-wave vortices in quadratic nonlinear media 

    Pérez Torres, Juan; Soto-Crespo, J M; Torner Sabata, Lluís; Petrov, D V (1998-02)
    Article
    Open Access
    We find families of vortex solitary waves in bulk quadratic nonlinear media under conditions for second-harmonic generation. We show that the vortex solitary waves are azimuthally unstable and that they decay into sets of ...
  • Splitting of light beams with spiral phase dislocations into solitons in bulk quadratic nonlinear media 

    Torner Sabata, Lluís; Petrov, D V (1997-08)
    Article
    Restricted access - publisher's policy
    We investigate the propagation of intense light beams in bulk quadratic nonlinear crystals under conditions for second-harmonic generation. We show numerically that input light beams with a spiral phase dislocation self-split ...
  • Vortex evolution in parametric wave mixing 

    Petrov, D V; Molina Terriza, Gabriel; Torner Sabata, Lluís (1999-04)
    Article
    Open Access
    We investigate the evolution of vortex wave front dislocations in multiple-wave second-harmonic generation processes in quadratic nonlinear media. Vortices nested in finite-size host beams are shown to nucleate and to ...
  • Vortex streets in walking parametric wave mixing 

    Molina Terriza, Gabriel; Torner Sabata, Lluís; Petrov, D V (1999-07)
    Article
    Restricted access - publisher's policy
    The combined effects of diffraction and Poynting vector walk-off in second-harmonic generation with pump beams that contain screw phase dislocations is addressed for what is believed to be the first time. We predict the ...