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采用变分原理与位力定理研究了非线性光通信系统色散补偿方案中,相邻孤子之间的相互作用对孤子传输特性的影响。结果表明:在相位匹配与等幅孤子注入时,在普通单模光纤中这两个孤子先相互吸引,而后又相互排斥,显现周期性碰撞的变化规律,形成束缚孤子态,而在色散补偿光纤中传输的孤子之间不发生碰撞;对相位不匹配与等幅孤子注入,孤子之间发生分离;对相位匹配和不等幅孤子注入,在色散补偿光纤中传输的孤子,如果初始间隔φ0越小,应注入较大的初始幅值差η0,以利于孤子的传输。
The effect of the interaction between adjacent solitons on the propagation characteristics of solitons in a dispersion compensation scheme of a nonlinear optical communication system is studied by using the variational principle and the force theory. The results show that the two solitons attract each other firstly and then repel each other in the ordinary single-mode fiber, and show the variation regularity of periodic collision to form the bound soliton state, while in the dispersion compensation fiber In the transmission of the solitons do not occur between the collision; phase mismatch and equal amplitude soliton injection, separation between solitons; for phase matching and non-equal number of soliton injection, dispersion compensation in the optical fiber transmission soliton, if the initial interval φ0 Small, should be injected into a larger initial amplitude difference η0, in order to facilitate the soliton transmission.