Open AccessPhysical-layer security in fractional orbital angular momentum multiplexing under atmospheric turbulence channel
Author(s) -
Yaqin Zhao,
Jinjiang Li,
Xin Zhong,
Hongyan Shi
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.023751
Subject(s) - multiplexing , angular momentum , eavesdropping , physics , orbital angular momentum multiplexing , physical layer , secrecy , turbulence , channel (broadcasting) , optics , computational physics , topology (electrical circuits) , telecommunications , computer science , wireless , quantum mechanics , total angular momentum quantum number , computer network , orbital angular momentum of light , engineering , electrical engineering , mechanics , computer security
In this paper, the physical layer security (PLS) of fractional orbital angular momentum (OAM) multiplexing under atmospheric turbulence channels is studied. Based on the PLS theory, the secrecy capacities and the probabilities of positive secrecy capacities of fractional OAM (FrOAM) multiplexing systems with different topological charge intervals are analyzed. The influence of the eavesdropping ratio and the power allocation on secrecy capacities are compared. The simulation results show that, under the finite aperture limitation, the FrOAM multiplexing technique provides higher security over the integer OAM multiplexing in terms of the total secrecy capacities under weak and medium turbulence.