一种快速高精度的相位恢复迭代法  

A High Accuracy and Fast Iterative Algorithm for Phase Retrieval

作　　者：黄利新[1,2] 姚新[1] 蔡冬梅[2] 郭永康[1] 姚军[2] 高福华[1] 

机构地区：[1]四川大学物理学院纳光子研究所,四川成都610064 [2]中国科学院光电技术研究所,四川成都610209

出　　处：《中国激光》2010年第5期1218-1221,共4页Chinese Journal of Lasers

基　　金：国家863-804(2008AA0920)资助课题

摘　　要：在传统GS算法的基础上,根据角谱传播理论并引入一简单的梯度,提出一种快速、高精度相位恢复迭代算法——加速角谱迭代法。该算法使用三个面(即一个输入面和两个输出面)的强度信息恢复输入面光场的相位分布。数值模拟结果表明,该算法能在二维情况下快速准确地恢复各种输入面光场的相位分布,并且大幅度地提高了复杂光场的相位恢复精度。在模拟实验中多次选取随机初始迭代值,该算法的收敛结果唯一,表明算法有良好的收敛性能。Based on conventional GS algorithm,an accuracy and fast algorithm for phase retrieval is presented.This algorithm,which can be called the accelerated angular spectrum iterative approad,induces a gradient by using the angular transfer functions.The intensity distribution of three planes,e.g.an incident plane and two emergent planes,is employed to retriere the phase distribution of incident optical field.The simulation result shows this algorithm can retrieve the phase distribution of an arbitrary two-dimensional incident optical field in high accuracy.The retrieval accuracy of complicated optical field is greatly enhanced.Robustness and sensibility of this algorithm are evaluated and the algorithm exhibits good convergence.

关 键 词：光计算 相位恢复 迭代算法 加速角谱传递函数 复杂光场 

分 类 号：O436[机械工程—光学工程]