Optical coherence encryption with structured random light

Deming Peng; Zhaofeng Huang; Yonglei Liu; Yahong Chen; Fei Wang; Sergey A. Ponomarenko; Yangjian Cai

doi:10.1186/s43074-021-00027-z

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Deming Peng, Zhaofeng Huang, Yonglei Liu, Yahong Chen, Fei Wang, Sergey A. Ponomarenko, Yangjian Cai. Optical coherence encryption with structured random light[J]. PhotoniX. doi: 10.1186/s43074-021-00027-z

Citation:

Deming Peng, Zhaofeng Huang, Yonglei Liu, Yahong Chen, Fei Wang, Sergey A. Ponomarenko, Yangjian Cai. Optical coherence encryption with structured random light[J]. PhotoniX. doi: 10.1186/s43074-021-00027-z

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Optical coherence encryption with structured random light

doi: 10.1186/s43074-021-00027-z

1.
School of Physical Science and Technology, Soochow University, Suzhou, 215006, China
2.
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
3.
Department of Electrical and Computer Engineering, Dalhousie University, Halifax, Nova Scotia, B3J 2X4, Canada
4.
Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada

Funds:

National Key Research and Development Project of China (2019YFA0705000), National Natural Science Foundation of China (NSFC) (91750201, 11874046, 11974218, and 11904247), Innovation Group of Jinan (2018GXRC010), Local Science and Technology Development Project of the Central Government (YDZX20203700001766), China Postdoctoral Science Foundation (2019M661915), Natural Science Foundation of the Jiangsu Higher Education Institutions of China (19KJB140017), Natural Sciences and Engineering Research Council of Canada (RGPIN-2018-05497).

Received Date: 2021-02-03
Accepted Date: 2021-03-28

Available Online: 2021-04-20

Abstract

Abstract

Information encryption with optical technologies has become increasingly important due to remarkable multidimensional capabilities of light fields. However, the optical encryption protocols proposed to date have been primarily based on the first-order field characteristics, which are strongly affected by interference effects and make the systems become quite unstable during light–matter interaction. Here, we introduce an alternative optical encryption protocol whereby the information is encoded into the second-order spatial coherence distribution of a structured random light beam via a generalized van Cittert–Zernike theorem. We show that the proposed approach has two key advantages over its conventional counterparts. First, the complexity of measuring the spatial coherence distribution of light enhances the encryption protocol security. Second, the relative insensitivity of the second-order statistical characteristics of light to environmental noise makes the protocol robust against the environmental fluctuations, e.g, the atmospheric turbulence. We carry out experiments to demonstrate the feasibility of the coherence-based encryption method with the aid of a fractional Fourier transform. Our results open up a promising avenue for further research into optical encryption in complex environments.
- Structured random light,
- Spatial coherence,
- Optical encryption,
- Atmospheric turbulence

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References(65)

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