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http://hdl.handle.net/10397/95554
Title: | Physically-secured high-fidelity free-space optical data transmission through scattering media using dynamic scaling factors | Authors: | Xiao, Y Zhou, L Pan, Z Cao, Y Chen, W |
Issue Date: | 28-Feb-2022 | Source: | Optics express, 28 Feb. 2022, v. 30, no. 5, p. 8186-8198 | Abstract: | In this paper, we propose a method of physically-secured high-fidelity free-space optical data transmission through scattering media using physically- and dynamically-generated scaling factors. Optical channel characteristics are explored, and scaling factors are physically and dynamically generated to serve as security keys in the developed free-space optical data transmission system. The generated dynamic scaling factors provide a security layer for free-space optical data transmission. To the best of our knowledge, it is the first time to physically and dynamically generate scaling factors in free-space optical data transmission system to realize data encryption. The scaling factors existing in free-space optical data transmission channel are physically and dynamically controlled by using two optical devices, i.e., variable beam attenuator (VBA) and amplitude-only spatial light modulator (SLM). Nonlinear and dynamic variation of scaling factors is realized in different free-space wave propagation environments. It is experimentally demonstrated that high security can be guaranteed in the developed physically-secured high-fidelity free-space optical data transmission system, since one random scaling factor is physically and dynamically generated for the transmission of each signal pixel value. In addition, the proposed physically-secured free-space optical data transmission scheme is robust to noise and scattering, and high-fidelity signals are retrieved at the receiving end. The proposed method could open up a new research perspective for the secured free-space optical data transmission. | Publisher: | Optical Society of America | Journal: | Optics express | EISSN: | 1094-4087 | DOI: | 10.1364/OE.448943 | Rights: | © 2022 Optica Publishing Group under the terms of the Open Access Publishing Agreement (https://opg.optica.org/library/license_v2.cfm#VOR-OA). Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved. The following publication Yin Xiao, Lina Zhou, Zilan Pan, Yonggui Cao, and Wen Chen, "Physically-secured high-fidelity free-space optical data transmission through scattering media using dynamic scaling factors," Opt. Express 30, 8186-8198 (2022) is available at https://doi.org/10.1364/OE.448943. |
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