%0 Journal Article
%T Sub-shot-noise-limited fiber-optic quantum receiver
%A Shcherbatenko, M. L.
%A Elezov, M. S.
%A Goltsman, G. N.
%A Sych, D. V.
%J Phys. Rev. A
%D 2020
%V 101
%N 3
%@ 2469-9926
%F Shcherbatenko_etal2020
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1268), last updated on Fri, 07 May 2021 13:54:36 -0500
%X We experimentally demonstrate a quantum receiver based on the Kennedy scheme for discrimination between two phase-modulated weak coherent states. The receiver is assembled entirely from standard fiber-optic elements and operates at a conventional telecom wavelength of 1.55 μm. The local oscillator and the signal are transmitted through different optical fibers, and the displaced signal is measured with a high-efficiency superconducting nanowire single-photon detector. We show the discrimination error rate is two times below that of a shot-noise-limited receiver with the same system detection efficiency.
%K SSPD mixer
%K SNSPD
%R 10.1103/PhysRevA.101.032306
%U https://link.aps.org/doi/10.1103/PhysRevA.101.032306
%U https://doi.org/10.1103/PhysRevA.101.032306
%P 032306 (1 to 5)