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中文摘要：
首先对阵列波导光栅（AWG）进行理论分析，采用高斯光束近似和有效折射率的方法，设计中心波长为1557．63nm，波长间隔为0．8nm的4x4 AWG，通过仿真计算和分析AWG的输出光谱，得到AWG的最小和最大插入损耗分别为2．0dB、3．5dB，小于行业标准5．5dB；相邻信道串扰小于-25dB，接近行业标准；3dB带宽为0．92nm，大于行业标准值0．4nm。通过Optisystem软件对基于4x4 AWG的光分插复用器（OADM）进行系统仿真，实现了对传输信道中光信号的上传和下载，每一路光信号的插入损耗为7dB左右，对以后OADM的设计和系统仿真提供了参考。
英文摘要：
First,the theory of arrayed waveguide grating （AWG） was investigated, and an 4x4 AWG with the central wavelength of 1557.63nm and the channel spacing of 0.8nm was designed by using the effective refractive index method and the Gaussian approximation. The maximum and minimum insertion loss are 2.0dB ,3.5dB, adjacent channel crosstalk is less than -25dB, and 3dB bandwidth is 0.92nm,which is better than industry standard. Then,a systematic simulation of the add-drop multiplexer （OADM） based on 4x4 AWG was made by using optical simulation soft Optisystem, and the upload and download of optical signals in transmission channel were achieved. Based on the assumption of the lossless optical switch,the insertion loss of each channel is 7dB ,which is consistent with the simulation result. The reference for the design of OADM and system simulation is provided.
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