OPTICAL QUASI-SOLITON SOLUTIONS FOR THE CUBIC-QUINTIC NONLINEAR SCHRÖDINGER EQUATION WITH VARIABLE COEFFICIENTS
作者： JIE-FANG ZHANG , QIN YANG
DOI: 10.1142/S0217979205033005
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摘要: Optical quasi-soliton solutions for the cubic-quintic nonlinear Schrodinger equation (CQNLSE) with variable coefficients are considered. Based on extended tanh-function method, we not only successfully obtained bright and dark solutions, but also kink under certain parametric conditions. We conclude that quasi-solitons induced by combined effects of group velocity dispersion (GVD) distribution, nonlinearity higher-order amplification or absorption coefficient quite different from those solitons GVD, without considering distribution (i.e. α(z)=0). Furthermore, choose appropriate optical fiber parameters D(z) R(z) to control time shift, discuss evolution behavior special quasi-soliton.
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