Abstract: Based on nonlinear Schrodinger equation, the properties of two-source-coupled-inputed soliton and the interaction between such soli tons and the first order solitons are numerically investigated by the split-step Fourier transformation method. A tentative idea of triply optical soliton communication system is proposed and disscussed, which made the relay distance further extended with the information increased by 1.6 factor. Besides, the high power input of the light source is not necessary by using such solitons.

Key words: optical soliton, numerical simulation, second-order soliton, optical soliton communication