期刊
EUROPEAN PHYSICAL JOURNAL PLUS
卷 133, 期 3, 页码 -出版社
SPRINGER HEIDELBERG
DOI: 10.1140/epjp/i2018-11931-2
关键词
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资金
- National Natural Science Foundation of China [11772017]
- Fundamental Research Funds for the Central Universities [50100002016105010]
Under investigation in this paper is a higher-order nonlinear Schrodinger equation with space-dependent coefficients, related to an optical fiber. Based on the self-similarity transformation and Hirota method, related to the integrability, the N-th-order bright and dark soliton solutions are derived under certain constraints. It is revealed that the velocities and trajectories of the solitons are both affected by the coefficient of the sixth-order dispersion term while the amplitudes of the solitons are determined by the gain function. Amplitudes increase when the gain function is positive and decrease when the gain function is negative. Furthermore, we find that the intensities of dark solitons are presented as a superposition of the solitons and stationary waves.
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