Now showing items 1-5 of 5

    • Adiabatic shaping of quadratic solitons 

      Torner Sabata, Lluís; Clausen, C B; Fejer, M M (1998-06)
      Article
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      We show the principle of operation of a setup to adiabatically shape solitons in quadratic nonlinear media to different beam profiles and widths or different fractions of energy carried by the second-harmonic wave. The ...
    • Engineered nonlinear lattices 

      Clausen, C B; Christiansen, P L; Torner Sabata, Lluís; Gaididei, Y B (1999-11)
      Article
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      We show that with the quasi-phase-matching technique it is possible to fabricate stripes of nonlinearity that trap and guide light like waveguides. We investigate an array of such stripes and find that when the stripes are ...
    • Engineering competing nonlinearities 

      Bang, O; Clausen, C B; Christiansen, P L; Torner Sabata, Lluís (1999-10)
      Article
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      Weak modulation of a quasi-phase-matching (QPM) grating opens possibilities for engineering both the average quadratic nonlinearity and the incoherent average cubic nonlinearity induced by QPM. The relative strength of the ...
    • Impurity solitons with quadratic nonlinearities 

      Clausen, C B; Pérez Torres, Juan; Torner Sabata, Lluís (1998-12)
      Article
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      We find families of solitary waves mediated by parametric mixing in quadratic nonlinear media that are localized at point-defect impurities. Solitons localized at attractive impurities are found to be dynamically stable. ...
    • Perturbative approach to the interaction of solitons in quadratic nonlinear media 

      Clausen, C B; Christiansen, P L; Torner Sabata, Lluís (1997-03)
      Article
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      We investigate the interaction between one-dimensional bright solitary waves in quadratic nonlinear media. We use a perturbational approach via collective coordinates to reduce the full evolution equations to a set of ...