Encoding and decoding communications based on perfect vector optical vortex arrays
Zixu Long, Huajie Hu, Xin Ma, Yuping Tai, Xinzhong Li
Abstract
Abstract We proposed the perfect vector optical vortex arrays (PVOVAs) for encoding and decoding communications, including the 2 × 2, 1 × 4, 4 × 4, and 2 × 4 array forms, which were generated with the coaxial superposition of two vector optical vortex arrays with left- and right-handed circular polarization. The polarization order and state of each vector element could be modulated independently by adjusting the corresponding topological charges and additional phases, θ n . By attaching code information to these vector elements with different states of polarization, the hexadecimal code elements, including 0 to F, were represented. Therefore, PVOVAs consisting of multiple vector elements can transmit encoding information and be decoded as original information in the receiving end. The school badge grayscale image, with a size of 64 × 64 pixels, was transmitted using the encoding and decoding communication via PVOVAs, and the received restored image had a reliable accuracy. This study proves PVOVAs have flexible spatial structure and controllable states of polarization, and it expands the application of vector optical fields in optical encoding and decoding communication.