准光孤子特性及其通信技术研究

对准光孤子理论进行了研究，用一个合适的、持续的色散管理方法，从一个修正的非线性薛定谔方程得到一个精确解，用这个解构造一个非线性稳定的准光孤子脉冲。用数值模拟的方法得出了准光孤子和光孤子的波形。结果表明：准光孤子几乎具有光孤子的全部优点，其脉冲宽度比光孤子要小很多，并且准光孤子的脉冲宽度可以通过调节光纤的结构参数来进行调整，准孤子能够在光纤中稳定地实现长距离传输，而且能够很好地克服由孤子的固有特性造成的对通信容量的限制，所以准光孤子有望成为下一代通信系统的最佳信号载体。

Propagation properties of quasi optical soliton and communication technology

Combination of programmed chirp and dispersion profiles produced a quasi-soliton nonlinear pulse with a stable structure.With the nonlinear effects taken into account,the concept of quasi-soliton is introduced and the comparison between the quasi-soliton solution and the soliton solution is made.Compared with soliton,quasi optical soliton has more advantages,such as reduced interaction,smaller peak power and pulse width adjustable by modulating fiber parameters.Quasi-soliton transmission has great potential in next generation of communication system.