提出了一种新型光学梳状滤波器 ,它由双Gires Tournois谐振腔代替Michelson干涉仪的两个全反射镜构成。基于Michelson干涉原理 ,给出了零畸变、高信道隔离度、宽平坦带宽、高一致性、结构简单、性能稳定的光学梳状滤波器的设计原理。设计了信道间隔为 5 0GHz,畸变 <0 0 5dB ,1dB带宽大于 0 38nm ,相邻信道间隔离度大于 2 3dB的光学梳状滤波器 A new optical comb filter is proposed, which consists of two total reflection mirrors with double Gires Tournois resonator instead of Michelson interferometer. Based on the principle of Michelson interference, the design principle of optical comb filter with zero distortion, high channel isolation, wide flat bandwidth, high consistence, simple structure and stable performance is given. An optical comb filter with channel spacing of 50 GHz, distortion <0 0 5 dB, 1 dB bandwidth greater than 0 38 nm and isolation between adjacent channels greater than 2 3dB is designed