基于光栅电磁场理论，应用光栅等效规则计算光栅槽形初始值、结合衍射效率等高线法优化设计光栅槽形，给出了具有几何对称中心的任意槽形光栅.以全息工艺上易于制作的正弦、矩形和两种梯形典型槽形光栅为例进行优化设计，结果表明，正弦槽形光栅C波段TM波衍射效率理论峰值为95%，测量值为92%.较互易定理优化方法，等效规则优化法拓宽了光通信光栅的制作方法、降低了制作难度，为全息方法制作光通信光栅提供了理论依据.

Based on grating electromagnetic theory, initial values of the grating groove were computed with grating equivalence rule. The design was then optimized with the diffraction efficiency contour method. Gratings of arbitrary groove shape with a geometry symmetry center can be designed in this way. As examples, four kinds of groove gratings were designed and fabricated with groove shapes of sine, rectangle and trapeze. The peak efficiency of TM mode for sine groove grating is 95% theoretically and 92% experimentally in C band.