In this paper, we propose orbital angular momentum (OAM) multiplexing at different ellipticity channels using a computer-generated hologram for holographic encryption. By encoding information into elliptic vortex beams with different helical mode indices and ellipticities, the OAM selective holographic information can only be reconstructed by an incident elliptic optical vortex (EOV) with an inverse helical mode index under a specific ellipticity. Holograms for different EOVs and multichannel multiplexing are well designed. Experimental results agree well with the theoretical design and numerical simulations, verifying the feasibility of OAM multiplexing-based ellipticity encrypted holography. This method can further increase data storage and enhance information security in different holographic systems.

中文翻译：

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椭圆度加密轨道角动量复用全息

在本文中，我们建议使用计算机生成的全息图在不同椭圆度通道上进行轨道角动量 (OAM) 多路复用以进行全息加密。通过将信息编码成具有不同螺旋模指数和椭圆率的椭圆涡旋光束，OAM 选择性全息信息只能通过特定椭圆率下具有反螺旋模指数的入射椭圆光学涡旋 (EOV) 来重建。不同 EOV 和多通道复用的全息图设计得很好。实验结果与理论设计和数值模拟吻合较好，验证了基于OAM复用的椭圆度加密全息的可行性。这种方法可以进一步增加数据存储量，增强不同全息系统中的信息安全性。