色散缓变光纤啁啾演变特性

Chirp Evolution Properties in Fibers with Slocoly Decreasing Dispersion

从理论上分析了色散缓变单模光纤中啁啾演变特性。采用付里叶变换法得到了只有群速度色散效应或自相位调制效应时皮秒脉冲啁啾的解析解，利用数值法模拟了色散缓变光纤中皮秒脉冲啁啾演变过程。结果表明：色散缓变光纤中的啁啾比常规光纤中的啁啾小，而且。

 We theoretically analysed chirp evolution properties in fiber with slowly decreasing dispersion (FSDD) and obtaind the analytical solution of the chirp for only groupvelocity dispersion (GVD) or selfphase modulation (SPM) by using Fouriertransform algorithm. The chirp evolution in FSDD is simulated by using numerical methods. The results show that the chirp in FSDD is little than that in the fibers and the picosecond pulse can transformed without change by reasonably choosing dispersion parameter.