Open AccessExperimental demonstration of free-space multi-state orbital angular momentum shift keying
Author(s) -
Shiyao Fu,
Yanwang Zhai,
Heng Zhou,
Jianqiang Zhang,
Tonglu Wang,
Xueting Liu,
Chunqing Gao
Publication year - 2019
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.27.033111
Subject(s) - optics , keying , angular momentum , free space optical communication , multiplexing , physics , decoding methods , transmitter , optical vortex , bit error rate , optical communication , amplitude shift keying , computer science , telecommunications , phase shift keying , channel (broadcasting) , quantum mechanics
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.