Crosstalk Impact on Continuous Variable Quantum Key Distribution in Multicore Fiber Transmission

Tobias A. Eriksson; Benjamin J. Puttnam; Georg Rademacher; Ruben S. Luis; Mikio Fujiwara; Masahiro Takeoka; Yoshinari Awaji; Masahide Sasaki; Naoya Wada

doi:10.1109/LPT.2019.2898458

Crosstalk Impact on Continuous Variable Quantum Key Distribution in Multicore Fiber Transmission

Tobias A. Eriksson, Benjamin J. Puttnam, Georg Rademacher, Ruben S. Luis, Mikio Fujiwara, Masahiro Takeoka, Yoshinari Awaji, Masahide Sasaki, Naoya Wada

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

We investigate the excess noise induced by crosstalk in a trench-assisted homogeneous 19-core fiber for a continuous variable quantum key distribution (CV-QKD) receiver. Crosstalk is studied for both 30 wavelength division multiplexing channels of 24.5-Gbaud PM-16QAM with 100-GHz channel spacing and for an amplified spontaneous emission signal with 37.5-GHz bandwidth. We show that in-band crosstalk from neighboring cores prohibits secret key generation. However, it is possible to place CV-QKD channels at wavelengths not used by the classical channels even though wideband amplified spontaneous emission noise is present. The excess noise induced by crosstalk from a neighboring core is shown to be time-dependent.

Original language	English
Article number	8638801
Pages (from-to)	467-470
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	31
Issue number	6
DOIs	https://doi.org/10.1109/LPT.2019.2898458
Publication status	Published - 2019 Mar 15
Externally published	Yes

Keywords

Quantum key distribution
crosstalk
multicore fibers
spatial division multiplexing

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1109/LPT.2019.2898458

Cite this

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title = "Crosstalk Impact on Continuous Variable Quantum Key Distribution in Multicore Fiber Transmission",

abstract = "We investigate the excess noise induced by crosstalk in a trench-assisted homogeneous 19-core fiber for a continuous variable quantum key distribution (CV-QKD) receiver. Crosstalk is studied for both 30 wavelength division multiplexing channels of 24.5-Gbaud PM-16QAM with 100-GHz channel spacing and for an amplified spontaneous emission signal with 37.5-GHz bandwidth. We show that in-band crosstalk from neighboring cores prohibits secret key generation. However, it is possible to place CV-QKD channels at wavelengths not used by the classical channels even though wideband amplified spontaneous emission noise is present. The excess noise induced by crosstalk from a neighboring core is shown to be time-dependent.",

keywords = "Quantum key distribution, crosstalk, multicore fibers, spatial division multiplexing",

author = "Eriksson, {Tobias A.} and Puttnam, {Benjamin J.} and Georg Rademacher and Luis, {Ruben S.} and Mikio Fujiwara and Masahiro Takeoka and Yoshinari Awaji and Masahide Sasaki and Naoya Wada",

note = "Funding Information: Manuscript received December 11, 2018; revised January 17, 2019; accepted February 2, 2019. Date of publication February 11, 2019; date of current version March 12, 2019. This work was supported in part by the ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan), JSPS KAKENHI under Grant JP18H01157, and in part by the Swedish Research Council (Vetenskapsr{\aa}det) under Grant 2017-06179. (Corresponding author: Tobias A. Eriksson.) T. A. Eriksson is with the National Institute of Information and Communications Technology, Tokyo 184-8795, Japan, and also with the Department of Applied Physics, Royal Institute of Technology (KTH), AlbaNova University Center, 106 91 Stockholm, Sweden (e-mail: eriksson@nict.go.jp). Publisher Copyright: {\textcopyright} 1989-2012 IEEE.",

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language = "English",

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AU - Eriksson, Tobias A.

AU - Puttnam, Benjamin J.

AU - Rademacher, Georg

AU - Luis, Ruben S.

AU - Fujiwara, Mikio

AU - Takeoka, Masahiro

AU - Awaji, Yoshinari

AU - Sasaki, Masahide

AU - Wada, Naoya

N1 - Funding Information: Manuscript received December 11, 2018; revised January 17, 2019; accepted February 2, 2019. Date of publication February 11, 2019; date of current version March 12, 2019. This work was supported in part by the ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan), JSPS KAKENHI under Grant JP18H01157, and in part by the Swedish Research Council (Vetenskapsrådet) under Grant 2017-06179. (Corresponding author: Tobias A. Eriksson.) T. A. Eriksson is with the National Institute of Information and Communications Technology, Tokyo 184-8795, Japan, and also with the Department of Applied Physics, Royal Institute of Technology (KTH), AlbaNova University Center, 106 91 Stockholm, Sweden (e-mail: eriksson@nict.go.jp). Publisher Copyright: © 1989-2012 IEEE.

PY - 2019/3/15

Y1 - 2019/3/15

N2 - We investigate the excess noise induced by crosstalk in a trench-assisted homogeneous 19-core fiber for a continuous variable quantum key distribution (CV-QKD) receiver. Crosstalk is studied for both 30 wavelength division multiplexing channels of 24.5-Gbaud PM-16QAM with 100-GHz channel spacing and for an amplified spontaneous emission signal with 37.5-GHz bandwidth. We show that in-band crosstalk from neighboring cores prohibits secret key generation. However, it is possible to place CV-QKD channels at wavelengths not used by the classical channels even though wideband amplified spontaneous emission noise is present. The excess noise induced by crosstalk from a neighboring core is shown to be time-dependent.

AB - We investigate the excess noise induced by crosstalk in a trench-assisted homogeneous 19-core fiber for a continuous variable quantum key distribution (CV-QKD) receiver. Crosstalk is studied for both 30 wavelength division multiplexing channels of 24.5-Gbaud PM-16QAM with 100-GHz channel spacing and for an amplified spontaneous emission signal with 37.5-GHz bandwidth. We show that in-band crosstalk from neighboring cores prohibits secret key generation. However, it is possible to place CV-QKD channels at wavelengths not used by the classical channels even though wideband amplified spontaneous emission noise is present. The excess noise induced by crosstalk from a neighboring core is shown to be time-dependent.

KW - Quantum key distribution

KW - crosstalk

KW - multicore fibers

KW - spatial division multiplexing

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Crosstalk Impact on Continuous Variable Quantum Key Distribution in Multicore Fiber Transmission

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