中文摘要：

随着传输容量和传输距离的增加，光纤传输中信号的 NLD（非线性损伤）已经成为限制光纤通信系统性能的主要因素之一。文章系统地总结了光域和电域 NLC（非线性补偿）技术的最新发展动态，对各种 NLC 技术的机制、特点及其实用性进行了分析比较，并重点介绍了数字相干光通信系统中基于DSP（数字信号处理）的 NLC技术，探讨了其未来的发展方向。

英文摘要：

Along with the increase of transmission capacity and distance driven by broadband applications,the Non-Linear Dis-tortion （NLD）of signals in fiber-optic transmissions has become one of the major limiting factors to fiber-optic communication systems.This paper summarizes the latest developments of Non-Linear Compensation （NLC）technologies in the optical and e-lectrical domains,analyzes and compares their mechanisms,characteristics and practical applications with the focus on Digital Signal Processing （DSP）-based NLC for digital coherent optical communication systems and the trend of their future develop-ment.