期刊
JOURNAL OF MODERN OPTICS
卷 60, 期 8, 页码 629-636出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09500340.2013.798432
关键词
multi-mode fibers and birefringent fibers; coupled higher-order nonlinear Schrodinger equations; mixed-type solitons; soliton interaction; Hirota method; symbolic computation
类别
资金
- National Natural Science Foundation of China [11272023]
- Open Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications)
- Fundamental Research Funds for the Central Universities of China [2011BUPTYB02]
In this paper, coupled higher-order nonlinear Schrodinger equations are studied for the ultrashort pulse propagation in such optical media as the multi-mode fibers and birefringent fibers. Through the Hirota method and symbolic computation, analytic mixed-type one- and two-soliton solutions are derived, and three sets of conditions for the non-singular solutions are given as well. Via the one-soliton solutions obtained, critical condition for the black and gray solitons is obtained analytically. Asymptotic analysis is carried out on the two-soliton solutions to derive the condition for the inelastic interaction. Evolution of the bound vector solitons, elastic and inelastic interactions between the two vector solitons are also investigated graphically. Moreover, after the inelastic interaction, the two bright solitons are observed to disappear, while the two dark ones form the new bound soliton.
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