title: Quantum key distribution over multicore fiber.
abstract: We present the first quantum key distribution (QKD) experiment over multicore fiber. With space division multiplexing, we demonstrate that weak QKD signals can coexist with classical data signals launched at full power in a 53 km 7-core fiber, while showing negligible degradation in performance. Based on a characterization of intercore crosstalk, we perform additional simulations highlighting that classical data bandwidths beyond 1Tb/s can be supported with high speed QKD on the same fiber.
authors.forename: J F
authors.initials: JF
authors.lastname: Dynes
authors.forename: S J
authors.initials: SJ
authors.lastname: Kindness
authors.forename: S W-B
authors.initials: SW
authors.lastname: Tam
authors.forename: A
authors.initials: A
authors.lastname: Plews
authors.forename: A W
authors.initials: AW
authors.lastname: Sharpe
authors.forename: M
authors.initials: M
authors.lastname: Lucamarini
authors.forename: B
authors.initials: B
authors.lastname: Fröhlich
authors.forename: Z L
authors.initials: ZL
authors.lastname: Yuan
authors.forename: R V
authors.initials: RV
authors.lastname: Penty
authors.forename: A J
authors.initials: AJ
authors.lastname: Shields