Physical-Layer Security in Free-Space Optical Communications using Bessel-Gaussian Beams

摘要

Physical-layer security in free-space optical communications channels is compromised when eavesdroppers perform optical beam-splitting attacks. Previous simulations showed that Laguerre-Gaussian beams carrying orbital angular momentum provide increased secrecy capacity compared to Gaussian beams. We extend those studies by simulating Bessel-Gaussian beams and obtain further improvement.