Solution of coupled nonlinear Schrödinger equations in focusing-defocusing medium by modified perturbation theory


  • Jerzy Jasiński Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warszawa
  • Mirosław Karpierz



The interaction of bright solitons of different orders and two different wavelengths propagating in the medium focusing for one wavelength and defocusing for the other is considered. The system of nonlinear Schrödinger equations is solved by means of perturbation theory. Application of an additional postulate to adjust both widths of the solitons and to modify the amplitude by a factor determined by the overlap integral greatly improves the accuracy of the description. The good accuracy of description is confirmed by numerical calculations.

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How to Cite

J. Jasiński and M. Karpierz, “Solution of coupled nonlinear Schrödinger equations in focusing-defocusing medium by modified perturbation theory”, Photonics Lett. Pol., vol. 13, no. 2, pp. 43–45, Jun. 2021.