对信道间距为100 GHz的8路10 Gb/s波分复用色散补偿系统进行了计算机仿真, 分析了光纤的色散和自相位调制(SPM)、 互相位调制(XPM)、 四波混频(FWM)等非线性效应在具有级联光放大器系统中的作用。 四种色散补偿方案是: SMF(常规单模光纤)+DCF1(色散斜率为正的色散补偿光纤)、 SMF+DCF2(色散斜率为负的色散补偿光纤)、 TW1(色散为正的非零色散光纤)+TW2(色散为负的非零色散光纤)和TW2+TW1。 结果表明: TW2+TW1方案具有最好的传输性能, 此时色散、 自相位调制、 互相位调制和四波混频具有几乎同等的作用； SMF+DCF1方案的传输性能最差, 原因是自相位调制使短波长信道的脉冲严重畸变。

Wavelength Division Multiplexed (WDM) system characteristics using various dispersion compensation schemes are compared by computer simulation. In our model, eight 10 Gb/s WDM channels with channel spacing of 100 GHz are transmitted through cascaded optical amplifiers. Fiber dispersion, self-phase modulation (SPM), cross-phase modulation (XPM) and four-wave-mixing (FWM) effects are considered. Dispersion compensation schemes include: conventional single mode fiber (SMF)+dispersion compensating fiber with positive dispersion slope (DCF1), SMF+dispersion compensating fiber with negative dispersion slope (DCF2), non-zero dispersion fiber with positive dispersion (TW1)+non-zero dispersion fiber with nagetive dispersion (TW2) and TW2+TW1. It is shown that TW2+TW1 has the best performance, where SPM, XPM and FWM are roughly equal. On the other hand, SMF+DCF1 results in the worst performance, where the combination of dispersion and SPM effect dominates, and the shorter wavelength channels suffer from severe pulse distortion.