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Crosstalk Impact on Continuous Variable Quantum Key Distribution in lticore Fiber Transmission
KTH, School of Engineering Sciences (SCI), Physics.
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2019 (English)In: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 31, no 6, p. 467-470Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC , 2019. Vol. 31, no 6, p. 467-470
Keywords [en]
Quantum key distribution, spatial division multiplexing, crosstalk, multicore fibers
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-248070DOI: 10.1109/LPT.2019.2898458ISI: 000461341300014Scopus ID: 2-s2.0-85062949986OAI: oai:DiVA.org:kth-248070DiVA, id: diva2:1314683
Note

QC 20190509

Available from: 2019-05-09 Created: 2019-05-09 Last updated: 2019-05-09Bibliographically approved

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