Probabilistic shaped 128-APSK CV-QKD transmission system over optical fibres
Pereira, D.
;
Almeida, M.
; Facão, M.
;
Pinto, A. N.
;
Silva, N. A.
Optics Letters Vol. 47, Nº 15, pp. 3948 - 3948, July, 2022.
ISSN (print): 0146-9592
ISSN (online): 1539-4794
Scimago Journal Ranking: 1,18 (in 2022)
Digital Object Identifier: 10.1364/OL.456333
Abstract
In this Letter we present a discrete modulated, continuous variables quantum key distribution implementation using two probabilistically shaped, 128-symbol, amplitude and phase shift keying constellations. At Bob’s detection side, a polarization diverse, true heterodyne receiver architecture is implemented for symbol recovery. We demonstrate experimentally that our system is capable of achieving security against collective attacks, while using accessible, telecom-grade material, and of functioning for an indefinitely long period of time at distances in excess of 185 km, in the asymptotic regime.
