本文提出了一种在卫星光通信链路建立中利用原子滤光器多峰特性的新型捕捉系统方案，可以将原子滤光器等效带宽减少到０００７ｎｍ，在实现宽视场角接收情况下进一步减少捕捉时间，并能满足卫星运动中的多普勒频移要求．此外本文讨论了该系统中原子滤光器等效带宽与接收视场角、信标发散角、最大捕捉时间等捕捉系统主要性能参数之间的关系． In this paper, we propose a new type of capture system that utilizes the multimodal characteristics of atomic filters in the establishment of satellite optical communication links, which can reduce the equivalent bandwidth of atomic filters to 0007 nm. In the case of wide viewing angle reception To further reduce the capture time, and to meet the Doppler shift in satellite motion requirements. In addition, this paper discusses the relationship between the equivalent bandwidth of the atomic filter in the system and the main performance parameters of the capture system, such as the receiving angle of view, the divergence angle of the beacon, the maximum capture time and so on.