通过分析光孤子传输系统(包括恒色散孤子、色散管理孤子)和准线性传输系统的概念及其传输特性,对这两种非线性光传输系统的发展前景提出了明确的观点.指出恒色散孤子利用色散效应和自相位调制达到平衡时实现脉冲的保形传输,但其高脉冲功率的特点使定时抖动性能严重劣化.色散管理光孤子则通过在传输线路上周期性交替采用正负色散系数的光纤,在保持较高的本地色散的同时,降低了路径平均色散,很好地解决了恒色散孤子系统的问题,但由于在传输过程中始终将脉冲宽度限制在一个比特时隙内,相邻信道脉冲间的频谱重叠将造成系统性能急剧下降.增加信道间隔虽然能解决这个问题,但其带宽利用率将明显降低,因而更适用于单信道的高速超长距离传输；与光孤子传输系统不同,准线性传输系统将非线性效应作为一种有害因素来进行控制,并通过强色散管理将路径平均色散保持在0值附近,使其频谱宽度戏剧性地降低,信道间的非线性作用也大大降低,因而非常适用于波分复用的高速超长距离传输.

Transmission characteristics of optical soliton transmission system(conventional soliton,dispersion management soliton) and quasi-linear transmission system were analyzed respectively.Conventional solitons keep the pulse shape by balancing the dispersion and nonliear effect during the transmission,but the timing jitter is severely degraded as the pusles′ high power.Dispersion management solitons solve this problem by using fibers with normal and abnormal dispersion coefficients in turn,which lower the average path dispersion while keep the higher local dispersion.But the system performance degraded rapidly by neighboring channels′ spectrum overlapping as the pulse width is always limited in one bit slot.So dispersion management soliton is proper for single channel high speed long haul transmission.Different with soliton transmission,quasi-linear transmission control the nonliear as a harmful effect,and keep the average path dispersion around zero by strongly dispersion management,so the spectrum width is degraded dramatically,and so do the nonlinear interaction among the channels.As this reason,quasi-linear transmission is suitable for high speed long haul wavelength division multiplex transmission.