二元位相型光栅分束器的改进设计方法  

Improved design of splitters

作　　者：鲁建业[1] 马玉刚[2] 申作春[1] 董蕴华[1] 高惠德[1] 马祖光[1] 

机构地区：[1]哈尔滨工业大学光电子技术研究所 [2]吉林大学物理学院,吉林长春130023

出　　处：《光学精密工程》2003年第6期572-575,共4页Optics and Precision Engineering

基　　金：哈尔滨工业大学校基金资助项目(No.HIT.2003.13)

摘　　要：为改进传统分束光栅的设计中不考虑光栅的实际周期长度、光栅深度、基底厚度等因素对各透射级次光波振幅的影响,设计结果与实际制作光栅的分束效果相比差距较大的不足之处,基于矢量衍射理论,提出了光栅分束器的改进设计方法。改进前后的主要不同之处在于计算透过率函数时是否考虑光栅实际参数对入射光的影响。由于比传统方法的设计基础更严格,因而从与实验结果的对比情况看,改进方法提高了设计结果与实际情况的符合程度。An improved design of splitters has been proposed using the vector diffraction theory to narrow the gap between the design and the splitting effect due to the fact that the real period length, grating depth and substrate depth are not considered in the traditional splitter design. The major difference between the traditional design and the improved design lies in whether the effect of the real grating parameters on the incident beam is taken into consideration while the transmittance function is calculated. Experimental results show that, in comparison with the traditional design, the improved design is closer to reality.

关 键 词：二元位相型光栅分束器 改进设计 矢量衍射理论 透过率函数 二元光学技术 

分 类 号：O436.1[机械工程—光学工程]