红外波段高效率低偏振相关损耗光栅的设计

Design simulation of high efficiency and low polarization dependence loss infrared grating

衍射效率高、偏振相关损耗低的衍射光栅是集成波分复用/解复用器件的一种核心元件,在光通信中具有很重要的应用价值。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。通过改变光栅的面形来进行计算,最终得到了衍射效率高和偏振相关损耗小的光栅面形。

Diffraction grating of high diffraction efficiency and low polarization dependent loss is a key component of the integrated wavelength division-multiplexing device. It has an important application in optics communication. 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. By changing grating profile, finally the grating profile that has high diffraction efficiency and low polarization dependence loss is gained.