之后，从数学上对倏逝波耦合，衍射耦合，干涉仪耦合的原理进行了详细的分析。
After that, evanescent wave coupling, diffraction coupling, interferometer coupling are analyzed in mathematics in detail.
运用严格的光栅衍射耦合波理论分析光栅的衍射特性，发现该方案不会引入相位畸变。
The rigorous coupled-wave theory is used to analyze the characteristics of grating diffraction, and the results indicate that this method produces no phase distortion.
通过利用严格的耦合波理论计算光栅衍射效率的方法，分别编制出了计算te波和TM波的衍射效率程序。
Using the method of rigorous coupled-wave theory to compute the diffraction efficiency of a grating, the program for calculating diffraction efficiency for both te and TM polarization is made.
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