已有研究表明,对于高速率长距离准线性色散补偿光纤传输系统,信道内非线性效应是限制系统传输性能的最主要因素。在考虑四波混频等信道内非线性效应的情况下,通过求解耦合非线性薛定谔方程组,详细比较了单信道归零码准线性色散补偿光纤传输过程中前置补偿、后置补偿以及对称补偿3种色散补偿方案的传输特性。研究表明,信道内四波混频(IFWM)是导致3种方案性能差别的主要因素;对于确定的掺铒光纤放大器间距,最佳色散补偿方案与传输速率有关。速率越高,前置补偿性能越好;相反,后置补偿最适合低速率传输。

Previous studies show that intrachannel nonlinear effects are the dominate factor which limits the performance of high-speed long-haul quasi-linear dispersion compensated fiber-optic transmission systems. In this paper, we compare the performance of different chromatic dispersion compensation schemes like pre-, post-, and symmetrical-dispersion compensations in detail by numerically solving the coupled nonlinear Schr dinger equations in the presence of intrachannel four-wave mixing (IFWM) in quasi-linear transmission systems. It is found that IFWM is the dominant limiting factor for a typical dispersion compensated quasi-linear transmission system. For a fixed Er-doped optical fiber amplifier spacing, optimal compensation scheme depends on transmission bit rate. As bit rate increases, the performance of pre-compensation becomes better and better. On the contrary, post-compensation exhibits its advantage more and more as bit rate decreases.