Three-channel robust optical encryption via engineering coherence Stokes vector of partially coherent light  

作　　者：Yonglei Liu Zhen Dong Yimeng Zhu Haiyun Wang Fei Wang Yahong Chen Yangjian Cai 

机构地区：[1]School of Physical Science and Technology&Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,Suzhou 215006,China [2]Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application,School of Physical Science and Technology,Suzhou University of Science and Technology,Suzhou 215009,China [3]Shandong Provincial Engineering and Technical Center of Light Manipulation&Shandong Provincial Key Laboratory of Optics and Photonic Device,School of Physics and Electronics,Shandong Normal University,Jinan 250014,China [4]Joint Research Center of Light Manipulation Science and Photonic Integrated Chip of East China Normal University and Shandong Normal University,East China Normal University,Shanghai 200241,China

出　　处：《PhotoniX》2024年第1期587-604,共18页智汇光学(英文)

基　　金：National Key Research and Development Program of China(2022YFA1404800,2019YFA0705000);National Natural Science Foundation of China(11974218,12192254,12274310,12274311,92250304,12347114);Jiangsu Funding Program for Excellent Postdoctoral Talent(2023ZB185).

摘　　要：Optical encryption strategies utilizing fully coherent light have been widely explored but often face challenges such as speckle noise and beam instabilities.In this work,we introduce a novel protocol for multi-channel optical information encoding and encryption using vectorial spatial coherence engineering of a partially coherent light beam.By characterizing the beam’s spatial coherence structure with a 2×2 coherence matrix,we demonstrate independent control over the three components of the coherence Stokes vector.This allows for three-channel optical information encoding and encryption,with applications in color image representation.Unlike existing methods based on fully coherent light modulations,our approach utilizes a two-point dependent coherence Stokes vector,proving resilient to random noise in experimental scenarios.Our findings provide a robust foundation for higher-dimensional optical encoding and encryption,addressing limitations associated with partially coherent light in complex environments.

关 键 词：Optical encryption Partially coherent light Spatial coherence engineering Coherence Stokes vector Color image encoding 

分 类 号：O43[机械工程—光学工程]