1.前言随着光传输系统中的传输速率的提高和信号传输带宽的增加,色散问题日益显著。已经敷设的常规光纤规G.652线路的零色散点位于1310nm,在1550nm处时则具有较大的色散系数(17ps/(nm·km))。光脉冲信号经过长途传输后,光纤色散值的积累会引起脉冲展宽,导致严重的码间串扰,使得接收端产生误码现象,从而使传输特性变坏。光纤色散补偿技术的研究,对提高目前已经敷设的常规光纤通信系统的容量具有极其重要的意义。发展高速全光网络的一个先决条件是必须做到光层面的色散监控与管理。色散补偿器件在高速传输系统及下一代智能光网络中有着广泛应用。 1. Introduction As the transmission rate in optical transmission systems increases and signal transmission bandwidth increases, the chromatic dispersion problem becomes more and more significant. The conventional fiber G.652 line has been laid with a zero dispersion point at 1310 nm and a large dispersion coefficient (17 ps / (nm · km)) at 1550 nm. After long-distance transmission of optical pulse signal, the accumulation of optical fiber dispersion value will cause pulse broadening, resulting in serious crosstalk between codes, resulting in bit error phenomenon at the receiving end, which deteriorates the transmission characteristics. The research of fiber dispersion compensation technology is of great significance to improve the capacity of the conventional optical fiber communication system that has been laid so far. A prerequisite for the development of high speed all-optical networks is the need to monitor and manage the dispersion of optical layers. Dispersion compensation devices in high-speed transmission systems and the next generation of intelligent optical network has a wide range of applications.