The characteristic of arrayed waveguide gratings is analyzed with the linear systems theory and the optical gratingequation is educed.
运用线性系统理论分析了阵列波导光栅的模场特性，导出器件传输的数学模型即光栅方程。
2
The double grating monochromator structure of pure rotational Raman lidar is introduced and the corresponding lidar equation is deduced.
介绍了双光栅转动拉曼激光雷达的双光栅单色仪结构，并推导了相应的雷达公式。
3
A theoretical equation of surface wave grating diffraction on liquid metal surface is established based on hydrodynamic equations and grating diffraction principle.