Modified coupled-wave equations are used to calculate the effect of grating shape on coupling coefficient of the second-order gratings.
利用改进的耦合波理论计算了具体器件结构中光栅形貌对二级光栅耦合系数的影响。
The second order nonlinear optical effects on the three-wave is analyzed, and the nonlinear optical coefficient of the uniaxial crystal is deduced from an example of the BBO.
本文以偏硼酸钡晶体为例，分析了三个光波的二阶非线性相互作用，并推导单轴晶体的有效非线性系数的表达式。
The physical process of diffraction by planar gratings'is analysed, based on the generalized second-order coupled-wave theory.
本文从推广的二阶耦合波理论出发，对平条纹面光栅衍射这一物理过程进行分析。
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