Holographic Encryption Applications Using Multichannel Bessel Beam

Holography provides a method for reconstructing both intensity and phase distribution, that can be used for microwave encryption. In this paper, we report a holographic encryption system featuring a multichannel Bessel beam as encryption key and phase distribution of special characters caring information as the output. The main component of the system consists of two quasi-optical mirrors, and the deformation of the mirrors is optimized by using a modified Katsenelenbaum-Semenov algorithm. The output field of system with different inputs is obtained by commercial software simulation. The feasibility of this encryption method as well as high security is verified by simulation.