Coherence of counter-propagating beams in a confidential communication system based on generation of cryptographic keys at the expense of atmospheric turbulence

V. P. Aksenov; V. V. Dudorov; V. V. Kolosov; Ch. E. Pogutsa

doi:10.1117/12.2603351

15 December 2021 Coherence of counter-propagating beams in a confidential communication system based on generation of cryptographic keys at the expense of atmospheric turbulence

V. P. Aksenov, V. V. Dudorov, V. V. Kolosov, Ch. E. Pogutsa

Author Affiliations +

Proceedings Volume 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 119161B (2021) https://doi.org/10.1117/12.2603351
Event: 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2021, Moscow, Russian Federation

Abstract

Analytical equations for mutual spatial coherence functions of counter-propagating laser beams in integrated transmit/receive optical systems are derived. These equations being fourfold integrals allow estimating the diffraction parameters of transceivers and turbulent propagation conditions, under which a cryptographic key can be generated based on the principle of reciprocity. For particular cases, the degree of coherence of counter-propagating beams and the degree of coherence averaged over the receiver aperture are calculated as functions of generalized parameters describing the turbulence intensity and diffraction at the apertures.

Citation Download Citation

V. P. Aksenov, V. V. Dudorov, V. V. Kolosov, and Ch. E. Pogutsa "Coherence of counter-propagating beams in a confidential communication system based on generation of cryptographic keys at the expense of atmospheric turbulence", Proc. SPIE 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 119161B (15 December 2021); https://doi.org/10.1117/12.2603351

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