[2] [2] Agrawal G P. Nonlinear Fiber Optics ［M］. 4nd ed., Boston: Academic Press, 2007.

[3] [3] Desem C, Chu P L. Soliton interaction in the presence of loss and periodic amplification in optical fibers ［J］. Opt. Lett., 1987, 12(5): 349-351.

[4] [4] Pinto A N, Agrawal G P, et al. Effect of soliton interaction on timing jitter in communication systems ［J］. J. Lightwave Technol., 1998, 1(4): 515-519.

[5] [5] Ozyazici M S. Interaction of higher order solitons ［J］. Journal of Optoelectronics and Advanced Materials, 2004, (1): 71-76.