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利用变分原理对耦合纤芯中传输光孤子之间的相互作用和形成束缚孤子态的条件进行了研究，发现高阶色散减弱甚至可以消除光孤子之间的相互作用。这一结果为耦合光纤器件的设计提供了一种实用消除光孤子之间相互作用的方法。
The variational principle is used to study the interaction between solitons and the soliton states in the coupled core. It is found that the higher order dispersion reduces or even eliminates the soliton interaction. This result provides a practical way to eliminate the interaction between optical solitons for the design of coupled optical fiber devices.