期刊
OPTICS EXPRESS
卷 27, 期 23, 页码 33111-33119出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.27.033111
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资金
- National Natural Science Foundation of China [11834001, 61905012]
- National Postdoctoral Program for Innovative Talents of China [BX20190036]
- China Postdoctoral Science Foundation [2019M650015]
- National Basic Research Program of China (973 Program) [2014CB340004]
- Beijing Institute of Technology Research Fund Program for Young Scholars
Orbital angular momentum (OAM), a new dimension of photons, has potentials in lots of domains as high-dimensional data coding/decoding. Here we experimentally demonstrate a free-space data transmission system based on 8 bits multi-state OAM shift keying, where multiplexed optical vortices containing 8 various OAM states are employed to constitute 8 bits binary symbols. In the transmitter, the data coding of OAM shift keying is realized by switching a series of special-designed holograms. And in the receiver, the decoding is done by a single Dammann vortex grating along with image processing. We experimentally transmit data, including a gray-scale image, in free-space for 10 meters, showing zero bit-error-rate. The demonstrated results indicate a wide prospect for the future high-dimensional large data rate optical security communications. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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