Influence of Atmospheric Turbulence on Optical Communications using Orbital Angular Momentum for Encoding

Abstract

We describe an experimental implementation of a free-space 11-dimensional communication system using orbital angular momentum (OAM) modes. This system has a maximum measured OAM channel capacity of 2.12 bits/photon. The effects of Kolmogorov thin-phase turbulence on the OAM channel capacity are quantified. We find that increasing the turbulence leads to a degradation of the channel capacity. We are able to mitigate the effects of turbulence by increasing the spacing between detected OAM modes. This study has implications for high-dimensional quantum key distribution (QKD) systems. We describe the sort of QKD system that could be built using our current technology.

6 pages, 5 figures

References in corpus (4)

• Free-Space distribution of entanglement and single photons over 144 km
• Long-distance quantum key distribution in optical fiber
• Two-photon wave mechanics
• Infinitesimal propagation equation for decoherence of an OAM entangled biphoton in atmospheric turbulence

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• Dynamical learning of a photonics quantum-state engineering process
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• Shaping entangled photons through emulated turbulent atmosphere
• Mitigating the effect of atmospheric turbulence on orbital angular momentum-based quantum key distribution using real-time adaptive optics with phase unwrapping
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• Compensation-Free High-Capacity Free-Space Optical Communication Using Turbulence-Resilient Vector Beams
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• Photonic cellular automaton simulation of relativistic quantum fields: observation of Zitterbewegung