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Proceedings Paper

Investigate the performance of real-time adaptive optics correction in a turbulent high-dimensional quantum communication channel
Author(s): Jiapeng Zhao; Yiyu Zhou; Boris Braverman; Cong Liu; Kai Pang; Nicholas K. Steinhoff; Glenn A. Tyler; Alan E. Willner; Robert W. Boyd
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Paper Abstract

The orbital angular momentum (OAM) of photons is a promising degree of freedom for high-dimensional quantum key distribution (QKD). Due to the greater flexibility in applications and the lower loss, QAM QKD over the free-space channel is still significant. However, effectively mitigating the adverse effects of atmospheric turbulence is a persistent challenge. In contrast to previous works focusing on correcting static simulated turbulence, we investigate the performance of OAM QKD in real atmospheric turbulence with real-time adaptive optics (AO) correction. We show that, it is possible to mitigate the errors induced by weak turbulence and establish a secure channel under some conditions. The cross-talk induced by turbulence and the performance of AO systems are investigated in a lab-scale link with controllable turbulence. The relations between the crosstalk and AO specifications is also studied. Our experimental results suggest that an advanced AO system with fine beam tracking, reliable beam stabilization, precise wavefront sensing and accurate wavefront correction is necessary to adequately correct turbulence-induced error.

Paper Details

Date Published: 4 March 2020
PDF: 9 pages
Proc. SPIE 11272, Free-Space Laser Communications XXXII, 112721C (4 March 2020); doi: 10.1117/12.2547186
Show Author Affiliations
Jiapeng Zhao, The Institute of Optics, Univ. of Rochester (United States)
Yiyu Zhou, The Institute of Optics, Univ. of Rochester (United States)
Boris Braverman, Univ. of Ottawa (Canada)
Cong Liu, The Univ. of Southern California (United States)
Kai Pang, The Univ. of Southern California (United States)
Nicholas K. Steinhoff, the Optical Sciences Co. (United States)
Glenn A. Tyler, the Optical Sciences Co. (United States)
Alan E. Willner, The Univ. of Southern California (United States)
Robert W. Boyd, The Institute of Optics, Univ. of Rochester (United States)
Univ. of Ottawa (Canada)

Published in SPIE Proceedings Vol. 11272:
Free-Space Laser Communications XXXII
Hamid Hemmati; Don M. Boroson, Editor(s)

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