Journal
OPTICS COMMUNICATIONS
Volume 427, Issue -, Pages 545-550Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2018.06.079
Keywords
Perfect optical vortex; Free-space optical communication; Spatial light modulator
Categories
Funding
- NSFC [61475098]
- Shanghai Science and Technology Commission Research Plan [14440500100]
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We demonstrate a 2-channel orbital angular momentum (OAM) multiplexed free space optical communication (FSO) link using perfect optical vortex (POV) beams. POV beams are able to be transmitted coaxially over than 1m with the assistance of a microscope objective and normal lens. 16QAM-OFDM signals are used to measure the performance, which is also compared with the FSO link based on Laguerre-Gaussian (LG) vortex beams multiplexing in the same experimental environment. The results show that, the FSO link employing POVs multiplexing can bring a better performance to the system, which can always obtain a lower BER under the same received power; The using of POVs as carriers greatly reduces the systems' sensitivity to the change of OAM topological charge numbers; And the constant diameter of POVs is also improve the versatility of the optical devices of different channels in the system.
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