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In this paper, we propose a new method to effectively measure orbital angular momentum (OAM) properties for long-distance transmission. Properties of OAM wavefront in terms of phase and amplitude are… Click to show full abstract
In this paper, we propose a new method to effectively measure orbital angular momentum (OAM) properties for long-distance transmission. Properties of OAM wavefront in terms of phase and amplitude are measured by rotating the OAM wave antenna and fixing the plane wave antenna as a reference. To verify OAM phase properties for long-distance transmission, experiments are conducted in Tsingtao, China, with 3.7 km and 7.0 km across the Yellow Sea, which demonstrates that vortex phase properties of OAM keep well after long-distance transmission. Meanwhile, periodical properties of OAM waves’ phase fronts are the same in different transmission distances.
Journal Title: IEEE Access
Year Published: 2019
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