提出用线性啁啾近似由光纤非线性克尔效应引入的非线性相移。分析了克尔效应对不同啁啾光脉冲的作用，并由此提出“啁啾管理法”改善色散补偿光路长距离传输的性能 A linear chirp approximation is proposed for the nonlinear phase shift introduced by the Kerr effect of fiber. The effect of Kerr effect on different chirped light pulses is analyzed, and the “chirp management method” is proposed to improve the performance of long-distance transmission of dispersion compensation optical path