讨论由光纤光栅和光环行器构成的光分插复用器的结构、性能和特点。提出采用一段刻有多个光纤布拉格光栅的光纤、两个光环行器、ＷＤＭ 复用器和解复用器等器件，构造能够对ＷＤＭ 的多个信道实施分插操作的光分插复用器。该光分插复用器的插入损耗要比简单地把多个单路的光分插复用器进行级联时小得多。波分复用全光网络中的光分插复用技术，是实现波分复用网络的关键技术之一。 The structure, performance and characteristics of optical add / drop multiplexer composed of fiber grating and optical circulator are discussed. It is proposed to use an optical fiber with multiple fiber Bragg gratings, two optical circulators, a WDM multiplexer and a demultiplexer, so as to construct an optical add / drop multiplexer capable of performing multiple insertion and dropping operations on a plurality of WDM channels. The insertion loss of the optical add / drop multiplexer is much smaller than when simply cascading multiple single optical add / drop multiplexers. Optical add-drop multiplexing in WDM optical networks is one of the key technologies to realize WDM networks.