期刊
OPTICS COMMUNICATIONS
卷 396, 期 -, 页码 50-57出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2017.03.023
关键词
Optical vortices; Spatial light modulator; Free-space optical communication
类别
资金
- NSFC [61475098]
- Shanghai Science and Technology Commission Research Plan [14440500100]
We experimentally demonstrate a free-space optical communication link using perfect vortex beams. Perfect vortex beams with different topological charges are generated using a phase-modulation-type spatial light modulator (SLM) loaded with novel phase holograms based on the Bessel function. With the help of a microscope objective and simple lens, perfect vortex beams are transmitted effectively for a certain distance. After completing the demodulation of perfect vortex beams carrying OFDM 16-QAM signals and a series of offline processing on the Gaussian bright spot demodulated from the perfect vortex beams, we also achieve a communication link. The constellations and mean bit error rates (BER) of subcarriers are shown.
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