Now showing items 1-20 of 21

    • Bandwidth-enhanced quadratic soliton formation by on-sample single-band amplification 

      Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís (2000-09)
      Article
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      Formation of optical solitons in quadratic nonlinear media under conditions for second-harmonic generation is investigated numerically in the presence of linear amplification at the fundamental frequency band. We show that ...
    • Complex soliton-like pattern generation in potassium niobate due to noisy, high intensity, input beams 

      Jankovic, L; Polyakov, S; Stegeman, G; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís; Bosshard, Ch; Gunter, P (2003-09)
      Article
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      We report the generation of complex soliton-like patterns in non-critically-phase-matched potassium niobate which occur in random spatial patterns from shot-to-shot. Up to five spots have been generated at input intensities ...
    • Deflection of quadratic solitons at edge dislocations 

      Petrov, D V; Carrasco Rodríguez, Sílvia; Molina Terriza, Gabriel; Torner Sabata, Lluís (2003-08)
      Article
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      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 ...
    • Efficiency-enhanced soliton optical parametric amplifier 

      Carrasco Rodríguez, Sílvia; Pérez Torres, Juan; Torner Sabata, Lluís; Fejer, M M (2002-06)
      Article
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      We show that the pump–to–signal power conversion efficiency of parametric chirped-pulse amplifiers made with periodically poled materials operating with multicolor spatial solitons can be significantly enhanced by employing ...
    • Engineerable generation of quadratic solitons in synthetic phase-matching 

      Carrasco Rodríguez, Sílvia; Pérez Torres, Juan; Torner Sabata, Lluís; Schiek, R (2000-09)
      Article
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      We show that the efficiency and the mismatch bandwidth of quadratic soliton formation under conditions of second-harmonic generation can be enhanced in an important way in synthetic phase-matching profiles. Soliton excitation ...
    • Engineering of spatial solitons in two-period QPM structures 

      Johansen, S K; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís; Bang, O (2002-08)
      Article
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      We report on a scheme which might make it practically possible to engineer the effective competing nonlinearities that on average govern the light propagation in quasi-phase-matching (QPM) gratings. Modulation of the QPM ...
    • Frequency doubling of femtosecond pulses in walk-off compensated npp 

      Pérez Torres, Juan; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís; Vanstryland, E W (2000-12)
      Article
      Open Access
      Summary form only given. N-(4-nitrophenyl)-L-prolinol (NPP) is an organic molecular crystal developped by molecular engineering, that exhibits one of the highest phase-matchable second-order susceptibilities reported so ...
    • Generation of multicolor spatial solitons with pulsed light 

      Carrasco Rodríguez, Sílvia; Pérez Torres, Juan; Artigas García, David; Torner Sabata, Lluís (2001-05)
      Article
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      The impact of temporal effects to the generation of multiple wave quadratic spatial solitons with pulsed light is shown. We examine soliton formation under conditions of second-harmonic generation but our conclusions are ...
    • Nonlinear optics: self-reflection and routing of multicolor solitons 

      Jankovic, L; Kim, H; Stegeman, G; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís; Katz, M (2003-12)
      Article
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    • Observation of multiple soliton generation mediated by amplification of asymmetries 

      Carrasco Rodríguez, Sílvia; Polyakov, S; Kim, H; Jankovic, L; Stegeman, G I; Pérez Torres, Juan; Torner Sabata, Lluís; Katz, M; Eger, D (2003-04)
      Article
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      We report the experimental observation of the formation of multiple optical quadratic solitons in a process mediated by the amplification of minute asymmetries in the diffraction properties of the input light. Experiments ...
    • Observation of self-focusing of light mediated by cubic nonlinearities in potassium titanyl phosphate 

      Carrasco Rodríguez, Sílvia; Kim, Hongki; Stegeman, George; Loza Álvarez, Pablo; Torner Sabata, Lluís (2002-11)
      Article
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      We report our observations of the transient self-narrowing of light beams mediated by dominant Kerr nonlinearities and two-photon absorption in a bulk potassium titanyl phosphate crystal near conditions for second-harmonic ...
    • 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
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      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 ...
    • Properties of quadratic multi-soliton generation near phase-match in PPKTP 

      Polyakov, S; Jankovic, L; Kim, H; Stegeman, G; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís; Katz, M (2003-06)
      Article
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      The properties of the multi-quadratic-soliton generation process have been investigated both theoretically and experimentally near and on phase-match in non-critically-phase-matched, periodically poled, potassium titanyl ...
    • Quadratic soliton self-reflection at a quadratically nonlinear interface 

      Jankovic, L; Kim, H; Stegeman, G I; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís; Katz, M (2003-11)
      Article
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      The reflection of bulk quadratic solutions incident onto a quadratically nonlinear interface in periodically poled potassium titanyl phosphate was observed. The interface consisted of the boundary between two quasi-phase-matched ...
    • Quadratic solitons: existence versus excitation 

      Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís; Pérez Torres, Juan; Artigas García, David; López-Lago, E; Couderc, V; Barthelemy, A (2002-06)
      Article
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      Whole families of stable optical solitons are known to exist in media with quadratic nonlinearity, and evidence of such existence has been demonstrated experimentally during the last years in several materials. However, ...
    • Quadratic spatial solitons in periodically poled KTiOPO4 

      Kim, H; Jankovic, L; Stegeman, G I; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís; Eger, D; Katz, M (2003-04)
      Article
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      The evolution of fundamental beams into quadratic spatial solitons was investigated in a periodically poled bulk KTiOPO4 crystal near and at phase matching. Various soliton properties, such as trapping efficiency as a ...
    • Quasi-phase-matching engineering for spatial control of entangled two-photon states 

      Pérez Torres, Juan; Alexandescu, A; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís (2004-02)
      Article
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      We show that transverse engineering of quasi-phase-matched geometries can be used to tailor the spatial mode function that describes the quantum state of photon pairs generated in spontaneous parametric downconversion. We ...
    • Second harmonic generation tuning curves in quasiphase-matched potassium titanyl phosphate with narrow, high-intensity beams 

      Katz, M; Eger, D; Kim, H; Jankovic, L; Stegeman, G; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís (American Institute of Physics (AIP), 2003-06)
      Article
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      The second harmonic generation (SHG) tuning curves with temperature and angle of incidence were measured in periodically poled KTiOPO4 for narrow fundamental beams at intensities typical of quadratic soliton generation. ...
    • Second harmonic generation, beam dynamics and spatial soliton generation in PPKTP 

      Kim, H; Jankovic, L; Stegeman, G; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís; Katz, M; Eger, D (2003-03)
      Article
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      Spatial solitons were investigated in periodically poled KTiOPO4 under conditions of second harmonic generation and many new features associated with soliton generation in quasi-phase-matched samples were observed .The ...
    • Tandem light bullets 

      Torner Sabata, Lluís; Carrasco Rodríguez, Sílvia; Pérez Torres, Juan; Crasovan, L C; Mihalache, Dumitru (2001-11)
      Article
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      We put forward a novel strategy to achieve formation of fully three-dimensional light bullets. The new scheme is based on tandem structures where nonlinearity and group-velocity dispersion required for the self-trapping ...