Routing the subcarrier wave quantum key distribution through metropolitan optical transport network

Tarabrina, A.D., Vorontsova, I.O., Kynev, S.M., Kiselev, F.D., Egorov, V.I.

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Тарабрина А.Д., Воронцова И.О., Кынев С.М., Киселев Ф.Д., Егоров В.И. Маршрутизация квантового распределения ключа на боковых частотах в городской оптической транспортной сети // Оптический журнал. 2023. Т. 90. № 6. С. 61–69. http://doi.org/10.17586/1023-5086-2023-90-06-61-69

Tarabrina A.D., Vorontsova I.O., Kynev S.M., Kiselev F.D., Egorov V.I. Routing the subcarrier wave quantum key distribution through metropolitan optical transport network [In Russian] // Opticheskiĭ Zhurnal. 2023. V. 90. № 6. P. 61–69. http://doi.org/10.17586/1023-5086-2023-90-06-61-69

For citation (Journal of Optical Technology):

Angelina Tarabrina, Irina Vorontsova, Sergey Kynev, Fedor Kiselev, and Vladimir Egorov, "Routing subcarrier wave quantum key distribution through a metropolitan optical transport network," Journal of Optical Technology. 90(6), 324-328 (2023)

Abstract:

Subject of study. This paper investigates the method of finding a sequence of nodes in a metropolitan optical transport network, connecting the sender and the receiver through a quantum channel propagating in the same optical fiber as the information channels, that maximizes secret key generation rate. Aim of the work. The purpose of this work is to route the subcarrier wave quantum key distribution in the metropolitan optical transport network so that the secret key generation rate is maximized. Method. The metropolitan optical transport network can be represented as a graph, where the vertices are the network nodes and the edges are the fiber optic lines connecting them. The weight of an edge corresponds to the secret key generation rate on the respective segment of the fiber optic line. The final key generation rate is limited by the slowest section of the path. The desired optimal route will be found by solving the graph bottleneck problem. In this paper a brute force algorithm is used. Main results. As a result of this work the optimal paths connecting two given nodes via a quantum channel for different network topologies are found. It is shown that there is a need for more efficient algorithm for a larger number of nodes. Practical significance. The findings of this study can be used in the integration of quantum communications in existing metropolitan optical transport networks.

Keywords:

quantum key distribution, wavelength division multiplexing, graph search, bottleneck problem, metropolitan optical transport networks

Acknowledgements:

This project was financially supported by JSC «RZhD».

OCIS codes: 270.5565, 270.5568

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