Topological transformations of speckles

被引：9
|
作者：
Gateau, Jerome [1 ]
Claude, Ferdinand [2 ]
Tessier, Gilles [2 ,3 ]
Guillon, Marc [2 ,4 ]
机构：
[1] Sorbonne Univ, CNRS, INSERM, LIB,UMR 7371,U1146, 15 Rue Ecole Med, F-75006 Paris, France
[2] Paris Descartes Univ, CNRS, Neurophoton Lab, Sorbonne Paris Cite,UMR 8250, Paris, France
[3] Sorbonne Univ, CNRS, INSERM, Inst Vis,UMR S968,UMR 7210, 17 Rue Moreau, F-75012 Paris, France
[4] Paris Descartes Univ, CNRS, SPPIN, Sorbonne Paris Cite,UMR 8003, Paris, France
来源：
OPTICA | 2019年 / 6卷 / 07期
关键词：
OPTICAL VORTICES; DISLOCATIONS; WAVES; LIGHT;
D O I：
10.1364/OPTICA.6.000914
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Deterministic control of coherent random light is highly important for information transmission through complex media. However, only a few simple speckle transformations can be achieved through diffusers without prior characterization. As recently shown, spiral wavefront modulation of the impinging beam allows permuting intensity maxima and intrinsic +/- 1-charged optical vortices. Here, we study this cyclic-group algebra when combining spiral phase transforms of charge n, with D-3- and D-4-point-group symmetry starlike amplitude modulations. This combination allows for statistical strengthening of permutations and controlling of the period to be 3 and 4, respectively. Phase saddle points are shown to complete the cycle. These results offer new tools to manipulate critical points in speckles. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：914 / 920
页数：7
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