孤子色散管理传输及其在常规光纤通信中的可行性研究

Investigation on the Communications Feasibility of Picoseconds Soliton Transmitted in Dispersion Management Fibers

从描述光纤中孤子脉冲传输的非线性薛定谔(NLS)方程出发,利用对称分步傅里叶方法对方程进行数值求解.研究了色散管理孤子(DMS)在常规光纤中的传输演化特性,分析了色散管理孤子在常规光纤通信系统中的可行性.结果表明,孤子在通过密集周期性搭配具有相反色散系数的光纤中传输,可以降低孤子间的相互作用,使得孤子的传输演化特性得到改善.利用色散管理来对常规光纤中光孤子脉冲之间的相互作用加以抑制,从而提高信息传输的比特率,但必须具有特殊的光纤制造工艺.

Starting from the nonlinear Schrodinger （NLS） equation expressing the soliton pulse transmitted in optical fibers, the evolution properties of the dispersion management soliton （DMS） are studied by making use of symmetrical slit-step Fourier numerical method, which the communications feasibility of DMS is analyzed. It is shown that the interaction of the optical solitons is decreased when the solitons are transmitting in the fiber dense managed opposite dispersion coefficient periodically, which the transmission properties of the soliton are improved. And then, that there must be a special manufacture technology of fiber is pointed out in this paper if the method of DMS is used to inhibit the interaction of the solitons in normal fiber, which will increase the bit rate of the information transmission.