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简要回顾了孤子的历史及其数字形式。详细探讨了非线性薛定谔方程的孤子解，因为它适用于描述非线性脉冲在色散光纤中的传播，还叙述了Ａ．Ｈａｓｅｇａｗａ关于用在无中继越洋传输光缆孤子长距离传播的建议和Ｌ．Ｆ．Ｍｏｌｌｅｎａｕｅｒ的实验。１９８６上，人们认为比特率给定后，无中继线路传输的距离存在局限，但最近的研究表明，适当设计可以克服这些限制，因此越洋光缆的较新设计有可能应用孤子。孤子的特性还使它们非常适用于全光开关和逻辑运算。还将介绍一些有关这些开关的最新实验进展。
A brief review of the soliton history and its digital form. The soliton solutions of the nonlinear Schrödinger equation are discussed in detail because it is suitable for describing the propagation of non-linear pulses in dispersive fibers and also for A. Hasegawa’s suggestion on long-distance propagation of solitons used in relayless transoceanic transmission cables. F. Mollenauer’s experiment. In 1986, there was a limit to the distances traveled by no trunk lines given the bit rate, but recent studies have shown that proper design can overcome these limitations, so newer designs for transoceanic fiber cables may make it possible to apply solitons. The properties of solitons also make them ideal for all-optical switching and logic operations. We will also introduce some recent experimental developments on these switches.