Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:2503.03436 · OptoElectronics and Communications Conference and International Conference on Photonics in Switching and Computing (OECC/PSC)

Time-Bin Phase and Polarization Based QKD Systems Performance Analysis Over 16Km Aerial Fibers

Persefoni Konteli, Nikolaos Makris, Konstantinos Tsimvrakidis, Alkinoos Papageorgopoulos, Ilias Papastamatiou, Petros Papapetropoulos, D. Syvridis, George Theodore Kanellos

Published Jun 29, 2025• 1 citation
arXivHTMLPDF

Abstract

We analyze the performance of Time-bin Phase and Polarization based QKD systems on mixed 14Km underground and 16Km of aerial fiber using plug-and-play commercial QKD systems.
DOI
10.23919/oecc/psc62146.2025.11111151

Related papers

Analysis of polarization fluctuation in long-distance aerial fiber for QKD system design

Rende Liu, Hao Yu, Jiye Zan +7 more

Optical Fiber Technology•Jan 5, 2019•26 citations

Polarization variations in installed fibers and their influence on quantum key distribution systems

Yuyang Ding, Hua Chen, Shuang Wang +6 more

Polarization variations in the installed fibers are complex and volatile, and would severely affect the performances of polarization-sensitive quantum key distribution (QKD) systems. Based on the recorded data about polarization variations of different installed fibers, we establish an analytical methodology to quantitatively evaluate the influence of polarization variations on polarization-sensitive QKD systems. Using the increased quantum bit error rate induced by polarization variations as a key criteria, we propose two parameters - polarization drift time and required tracking speed - to characterize polarization variations. For field buried and aerial fibers with different length, we quantitatively evaluate the influence of polarization variations, and also provide requirements and suggestions for polarization basis alignment modules of QKD systems deployed in different kind of fibers.

Optics Express•Oct 27, 2017•72 citations

Efficient time-bin qubit analyzer compatible with multimode optical channels

Jeongwan Jin, Sascha Agne, Jean‐Philippe Bourgoin +3 more

Time-bin encoded photonic qubits are robust against decoherence in birefringent media such as optical fibers, which has led to many successful quantum communication demonstrations, including a Mach-Zehnder interferometer-based system, plug-and-play quantum key distribution (QKD), differential phase shift (DPS) and coherent one-way (COW) protocols, quantum teleportation, and elements of quantum repeaters. Despite these successes, time-bin encoding is considered impractical for turbulent free-space or multimode fiber channels, because spatial and temporal mode distortions hinder the interference required for analysis of time-bin superposition states. Here we present an efficient time-bin qubit analyzer, assisted by passive relay optics, that matches the spatial mode of the interfering paths. Our system demonstrates interference visibility of 89 %, even for strongly distorted optical input modes emerging from multimode fiber under variable angles of incidence. We measure a high level of entanglement between a time-bin qubit and a separate polarization qubit, thereby demonstrating the feasibility of time-bin based quantum communication over optical multimodal links.

•Sep 24, 2015•6 citations

Feasibility analysis and for satellite-to-ground prepare and measure and entanglement-based QKD with terrestrial fiber integration

Nikolaos K. Lyras, Argiris Ntanos, Aristeidis Stathis +3 more

International Conference on Space Optics (ICSO)•Jul 28, 2025•0 citations

Field-test Quantum Key Distribution Over mixed Buried/Aerial Fiber Links with 16 km Aerial Fiber Segments

Persefoni Konteli, Nikolas Makris, Konstantinos Tsimvrakidis +5 more

We present an experimental setup of Quantum Key Distribution over mixed fiber optical links with 16 Km aerial fiber segments employing two commercial QKD systems with different encoding meth-ods and analyse their performance in comparison to the corresponding all-fiber links transmission. ©2025 The Author(s)

European Conference on Optical Communication•Sep 28, 2025•0 citations

Field demonstration of differential-phase-shift QKD system over 90-km link under the framework of Tokyo QKD Network

Toshimori Honjo, Fujiwara Mikio, Masahide Sasaki +4 more

IEICE Technical Report; IEICE Tech. Rep.•Jan 20, 2011•0 citations
Polarization variations in the installed fibers are complex and volatile, and would severely affect the performances of polarization-sensitive quantum key distribution (QKD) systems. Based on the recorded data about polarization variations of different installed fibers, we establish an analytical methodology to quantitatively evaluate the influence of polarization variations on polarization-sensitive QKD systems. Using the increased quantum bit error rate induced by polarization variations as a key criteria, we propose two parameters - polarization drift time and required tracking speed - to characterize polarization variations. For field buried and aerial fibers with different length, we quantitatively evaluate the influence of polarization variations, and also provide requirements and suggestions for polarization basis alignment modules of QKD systems deployed in different kind of fibers.
Time-bin encoded photonic qubits are robust against decoherence in birefringent media such as optical fibers, which has led to many successful quantum communication demonstrations, including a Mach-Zehnder interferometer-based system, plug-and-play quantum key distribution (QKD), differential phase shift (DPS) and coherent one-way (COW) protocols, quantum teleportation, and elements of quantum repeaters. Despite these successes, time-bin encoding is considered impractical for turbulent free-space or multimode fiber channels, because spatial and temporal mode distortions hinder the interference required for analysis of time-bin superposition states. Here we present an efficient time-bin qubit analyzer, assisted by passive relay optics, that matches the spatial mode of the interfering paths. Our system demonstrates interference visibility of 89 %, even for strongly distorted optical input modes emerging from multimode fiber under variable angles of incidence. We measure a high level of entanglement between a time-bin qubit and a separate polarization qubit, thereby demonstrating the feasibility of time-bin based quantum communication over optical multimodal links.