Open AccessPolarization control algorithm for QKD systems
Author(s) -
E E Mekhtiev,
I S Gerasin,
N V Rudavin,
Alexey V. Duplinsky,
Y. V. Kurochkin
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2086/1/012092
Subject(s) - polarization controller , quantum key distribution , bb84 , computer science , polarization (electrochemistry) , algorithm , polarization mode dispersion , quantum , optical fiber , electronic engineering , quantum channel , engineering , telecommunications , physics , fiber laser , quantum information , chemistry , quantum mechanics
The crucial task for polarization-encoding fiber QKD is to compensate polarization drift occurring in a quantum channel. To solve this problem, the receiver usually uses a polarization controller. For proper operation, this device must be efficiently managed in real-time. In this work, a gradient-descent-based algorithm is proposed to solve this problem. The algorithm was implemented and tested on a QRate commercial QKD fiber system, that utilizes BB84-protocol. Low and stable QBER has been obtained during a day of continuous operation.