Impact of Third-Order Fiber Nonlinearities on Optical WDM Communication Systems

9417595卡佐夫斯基波分复用(WDM)正在迅速发展，成为从局域网(LAN)到广域网(WAN)的未来光网络的一项关键技术。三阶光纤非线性(自相位调制(SPM)、交叉相位调制(XPM)和四波混频(FWM))限制了WDM网络的容量。我们建议从理论和实验上研究XPM和FWM对一个波长通道产生的影响，以及由这些影响产生的幅度和频率噪声的统计。我们将定量评估XPM和FWM对系统性能指标的惩罚，如误码率(BER)和闭眼。我们将研究通过改变光功率、波长数目、信道间隔、调制频率和格式、色散、编码、偏振和接收器类型来最小化XPM和FWM的影响的技术。通过这项研究，我们将开发出XPM和FWM对WDM系统的影响的量化模型，减少这种影响的技术，以及在此类网络中不可避免地存在非线性效应的情况下实现最佳系统性能的技术。***

9417595 Kazovsky Wavelength-division multiplexing (WDM) is rapidly evolving as a key technology for future optical networks ranging from local area networks (LANs) to wide-area networks (WANs). Third-order fiber nonlinearities (self-phase modulation (SPM), cross-phase modulation (XPM) and four-wave mixing (FWM) set limit on the capacity of WDM networks. We propose to investigate, both theoretically and experimentally, the effect of XPM and FWM produced on one wavelength channel by the others, by investigating the statistics of amplitude and frequency noise produced by these effects. We will quantitatively evaluate penalties imposed by XPM and FWM on measure on system performance, such as bit error rate (BER) and eye closure. We will investigate techniques for minimizing the impact of XPM and FWM by varying optical power, number of wavelengths, channel spacing, modulation frequency and format, dispersion, coding, polarization, and receiver type. Through this investigation, we will develop quantitative models of the impact of XPM and FWM on WDM systems, techniques to minimize this impact, and techniques to achieve optimum system performance consistent with the unavoidable presence of nonlinear effects in such networks. ***