1. Three-channel robust optical encryption via engineering coherence Stokes vector of partially coherent light
- Author
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Yonglei Liu, Zhen Dong, Yimeng Zhu, Haiyun Wang, Fei Wang, Yahong Chen, and Yangjian Cai
- Subjects
Optical encryption ,Partially coherent light ,Spatial coherence engineering ,Coherence Stokes vector ,Color image encoding ,Applied optics. Photonics ,TA1501-1820 - Abstract
Abstract 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 $$2 \times 2$$ 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.
- Published
- 2024
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