A simple and effective method for calculating the wave aberration for an etched diffraction grating (EDG) demultiplexer is presented.

• 对作为波分复用关键器件之一的刻蚀衍射光栅 (EDG)的像差特性提出了一种简单方便的计算方法 ；分析了像差对刻蚀衍射光栅频谱响应的影响 .