Abstract: OADM schemes at present are summarized in this paper and all of them are classified to 4 types. Their configurations and main performance are introduced and evaluated. Also two types of configurations of OADM are verified in experiments. Finally a example is given for showing the all-optical WDM networks using OADM.

Key words: all-optic networks, optical all-drop multiplexer(OADM), fiber Bragg grating, wavelength division multiplexing(WDM), acoustic-optic tunable filter(AOTF)

摘要： 对目前的OADM方案进行了综述，归纳为4类形式，对各类OADM的结构和主要性能做了介绍和评估，并对2种OADM的结构进行了实验研究，最后结合一个OADM的实例做了说明。

关键词: 全光网, 上下话路, 光纤光栅, 波分复用, 声光可调谐滤波器