Holographic Encryption Applications Using Composite Orbital Angular Momentum Beams

Holographic Encryption Applications Using Composite Orbital Angular Momentum Beams
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使用复合轨道角动量光束的全息加密应用

DOI:
10.3390/photonics9090605
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发表时间:
2022-08
期刊:
影响因子:
2.4
通讯作者:
Xiao Yuan
Xiao Yuan
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Nian Zhang;Baoxing Xiong;Xiang Zhang;Xiao Yuan

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光学轨道角动量全息术是一种重要的光学加密技术。然而,OAM全息只能用OAM光束编码和解码,这限制了光学加密的水平。在这里,复合OAM光束被引入使用计算机生成的全息图(CGH)的全息加密。目标图像用复合螺旋模式指数编码,并且OAM全息图像只能在特定照明复合OAM光束下重建。实验结果与理论设计和数值模拟结果一致,验证了复合OAM光束可以为光学全息加密提供更高的安全性。所提出的方法可用于增强防伪应用、安全通信系统和成像系统。
Optical orbital angular momentum (OAM) holography has been developed and implemented as a vital method for optical encryption. However, OAM holography can only be encoded and decoded with an OAM beam, which limits the level of optical encryption. Here, composite OAM beams are introduced using a computer-generated hologram (CGH) for holographic encryption. The target image is encoded with composite helical mode indices, and the OAM holographic image can only be reconstructed under a specific illuminating composite OAM beam. The experimental results are consistent with the theoretical design and numerical simulations, verifying that composite OAM beams can provide a higher security level for optical holographic encryption. The proposed method can be used to enhance anti-counterfeiting applications, secure communication systems, and imaging systems.
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