OPTICAL DISLOCATION NETWORKS IN HIGHLY RANDOM-MEDIA
OPTICAL DISLOCATION NETWORKS IN HIGHLY RANDOM-MEDIA
复制标题
DOI：
10.1016/0030-4018(93)90375-f
复制
发表时间：
1993-08-15
影响因子：
2.4
通讯作者：
FREILIKHER, V
中科院分区：
文献类型：
--
作者：
FREUND, I;SHVARTSMAN, N;FREILIKHER, V
从理论和实验两个方面研究了高斯散斑中的光学位错网络。建议用一个简单的乘积波函数来描述任意位错网络。用该波函数预测的相图与测量的各种不同位错的干涉图进行了比较，发现理论和实验符合得很好。给出了基于采样定理的简单论证，认为在高斯极限下，位错网络包含了重建所需的所有信息。总波场，或者，也可以使用过零方法从相位图的一小段重建波场。也有人认为，相邻位错之间一定存在某种程度的相关性。
Networks of optical dislocations in gaussian speckle patterns are studied both theoretically and experimentally. A simple product wavefunction is suggested to describe an arbitrary dislocation network. Phase maps predicted by this wavefunction are tested against measured interferograms for a variety of different dislocations and good agreement is found between theory and experiment. Simple arguments based upon the sampling theorem are presented which suggest that in the gaussian limit the dislocation network contains all the information needed to reconstruct the. total wavefield, and alternatively, that the wavefield may also be reconstructed from a small fragment of the phase map using the method of zero crossings. It is also argued that there must exist some degree of correlation between neighboring dislocations.