[1] Kivshar Y S. Dark solitons in nonlinear optics. IEEE J. Quant. Electron., 1993, 29(1):250～264

[2] Tomlinson W J, Hawkins R J, Weiner A M et al.. Dark optical soitons with finite-width background pulses. J. Opt. Soc. Am. (B), 1989, 6(3):329～334

[3] Li Zhonghao, Li Lu, Tian Huiping et al.. New types of solitary wave solutions for the higher order nonlinear Schroedinger equation. Phys. Rev. Lett., 2000, 84(18):4096～4099

[4] Porsezian K, Nakkeeran K. Optical solitons in presence of Kerr dispersion and self-frequency shift. Phys. Rev. Lett., 1996, 76(21):3955～3958

[5] WangLi, Li ZHonghao, Zhou Guosheng. Analysis of transinission properties of femtosecond pulse in medium with momentum method. Acta Optica Sinica (光学学报), 2001, 21(10):1219-1223 (in Chinese)

[6] Tian Huiping, Li Zhonghao, Wang Gang et al.. Numerical research of interaction between femtosecond optical pulses. Acta Optica Sinica (光学学报), 2001, 21(5):513～517 (in Chinese)

[7] Zhao W, Bourkoff E. Interactions between dark solitons. Opt. Lett., 1989, 14(24):1371～1373

[8] Gordon J P. Interaction forces among solitons in optical fibers. Opt. Lett., 1983, 8(11):596～598

[9] Mitschke F M, Mollenauer L F. Experimental observation of interaction forces between solitons in optical fibers. Opt. Lett., 1987, 12(5):355～357

[10] Cao Wenhua, Liu Songhao, Guo Qi. Soliton interaction in dispersion-shifted fibers. Acta Optica Sinica (光学学报), 1999, 19(6):739～745 (in Chinese)

[11] Kodama Y, Hasegawa A. Nonlinear pulse propagation in a monomode dielectric guide. IEEE J. Quant. Electron., 1987, QE-23(5):510～524

[12] Liu Shanliang, Wang Wenzheng.Exact N-soliton solutions of the extended nonlinear Schroedinger equation. Phys. Rev. (E), 1994, 49(6):5726～5730

[13] Li Zhonghao, Xu Xinmin, Li Lu et al.. Dark solitory wave solution of femtosecond optical pulse in optical fibers. Acta Photonica Sinica (光子学报), 1998, 27(z2):107～110

[14] Palacios S L, Guinea A, Fernandez-Diaz J M et al.. Dark solitary waves in the nonlinear Schrdinger equation with third order dispersion, self-steepening and self-frequency shift. Phys. Rev. (E), 1999, 60(1):R45～R47