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理论上分析了当存在高阶色散时具有饱和非线性的非克尔光纤的调制不稳定性．三阶色散对调制不稳定性没有影响，四阶色散效应导致在正常和反常色散区出现了新的调制不稳定区．并且对比了不同他和参数的增益谱，在新的调制不稳定区，发现同样有一个临界调制频率对应两个入射功率的现象．
The modulation instabilities of non-Kerr fibers with saturated nonlinearities in the presence of higher-order dispersion are theoretically analyzed. Third-order dispersion has no effect on modulation instability, and fourth-order dispersion causes new modulation instability in normal and anomalous dispersion regions. And compared with different he and the parameter gain spectrum, in the new modulation unstable region, we found that there is also a critical modulation frequency corresponding to the two incident power phenomenon.