Open AccessOrbital angular momentum mode-demultiplexing scheme with partial angular receiving aperture
Author(s) -
Shilie Zheng,
Xiaonan Hui,
Jiangbo Zhu,
Hao Chi,
Xiaofeng Jin,
Siyuan Yu,
Xianmin Zhang
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.012251
Subject(s) - angular momentum , optics , multiplexing , physics , free space optical communication , aperture (computer memory) , transmission (telecommunications) , optical communication , angular aperture , mode (computer interface) , beam (structure) , computer science , telecommunications , lens (geology) , acoustics , focal length , quantum mechanics , operating system
For long distance orbital angular momentum (OAM) based transmission, the conventional whole beam receiving scheme encounters the difficulty of large aperture due to the divergence of OAM beams. We propose a novel partial receiving scheme, using a restricted angular aperture to receive and demultiplex multi-OAM-mode beams. The scheme is theoretically analyzed to show that a regularly spaced OAM mode set remain orthogonal and therefore can be de-multiplexed. Experiments have been carried out to verify the feasibility. This partial receiving scheme can serve as an effective method with both space and cost savings for the OAM communications. It is applicable to both free space OAM optical communications and radio frequency (RF) OAM communications.