Modeling Optical Fiber Space Division Multiplexed Quantum Key Distribution Systems
mario Ure\~na, Ivana Gasulla, Francisco Javier Fraile, Jos\'e, Capmany
TL;DR
This paper presents a model to evaluate the performance of quantum key distribution over space division multiplexed fibers, analyzing feasibility in multicore fibers for pure QKD and combined QKD with classical channels.
Contribution
It introduces a novel model for assessing QKD performance in SDM fibers and explores practical transmission scenarios in multicore fibers.
Findings
Standard homogeneous MCFs support QKD distances similar to single-core fibers.
Heterogeneous MCFs are necessary for simultaneous QKD and classical channel transmission.
Feasibility depends on fiber type and transmission configuration.
Abstract
We report a model to evaluate the performance of multiple quantum key distribution (QKD) channel transmission using spatial division multiplexing (SDM) in multicore (MCF) and few-mode fibers (FMF). The model is then used to analyze the feasibility of QKD transmission in 7-core MCFs for two scenarios of practical interest. First for transmission of only QKD channels, the second for simultaneous transmission of QKD and classical channels. In the first case, standard homogeneous MCFs enable transmission distances per core compatible with transmission parameters (distance and net key rate) very close to those of single core singlemode fibers. For the second case, heterogeneous MCFs must be employed to make this option feasible
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