随着人们对通信容量的需求日益增大，基于微环谐振腔产生的光频梳，可以很好地满足通信系统的光源要求。光频梳具有光谱范围广、相干性高、集成化等特点，由于光频梳是基于四波混频效应产生的，因此对微环谐振腔的色散曲线要求比较严格。总结了目前几种控制微环谐振腔色散特性的最新研究，包括改变微环的宽度等，利用slot 结构和微环结构相结合，采用光子晶体结构等方法，对这些结构的优缺点及性能作了比较分析。同时还对进一步优化微谐振腔的色散曲线提出了展望，利用微环和光子晶体结构的组合方法，有可能实现较小光谱范围内色散曲线的优化，提高四波混频的效率。

With the increasing demand for the communication capacity, the optical frequency combs based on micro-ring resonator can satisfy the requirements of communication systems. The optical frequency comb has the features of wide spectrum, high coherence and integration. The optical frequency comb generation is based on the four-wave-mixing(FWM) effect in micro-ring resonator, so the requirement of dispersion curve about resonator is more stringent. This paper summarizes several latest researches about dispersion control of microring resonator, including change the micro-ring width, the combination of slot structure and micro-ring structure, the use of photonic crystal structures. Up on these, we can make a comparative analysis of their strengths, weaknesses and performance. Also there is a prospect on the further optimization of micro-cavity dispersion curves. Utilizing the combination of micro-ring and photonic crystal structure, may realize an optimization of dispersion curves in small spectrum, and improve the efficiency of FWM.