Quantum key distribution over multicore fiber.

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.

[1]  Peter J. Winzer,et al.  Making spatial multiplexing a reality , 2014, Nature Photonics.

[2]  Richard J. Hughes,et al.  Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments , 2009 .

[3]  R. Penty,et al.  Quantum key distribution for 10 Gb/s dense wavelength division multiplexing networks , 2014, 1402.1508.

[4]  A R Dixon,et al.  High speed prototype quantum key distribution system and long term field trial. , 2015, Optics express.

[5]  Kai Chen,et al.  Metropolitan all-pass and inter-city quantum communication network. , 2010, Optics express.

[6]  A. W. Sharpe,et al.  Coexistence of High-Bit-Rate Quantum Key Distribution and Data on Optical Fiber , 2012, 1212.0033.

[7]  James F. Dynes,et al.  Quantum secured gigabit optical access networks , 2015, Scientific reports.

[8]  V. Scarani,et al.  The security of practical quantum key distribution , 2008, 0802.4155.

[9]  A. W. Sharpe,et al.  High speed single photon detection in the near-infrared , 2007, 0707.4307.

[10]  H. Weinfurter,et al.  The SECOQC quantum key distribution network in Vienna , 2009, 2009 35th European Conference on Optical Communication.

[11]  L. Nelson,et al.  Space-division multiplexing in optical fibres , 2013, Nature Photonics.

[12]  Gilles Brassard,et al.  Secret-Key Reconciliation by Public Discussion , 1994, EUROCRYPT.

[13]  Paul D. Townsend,et al.  Quantum information to the home , 2011 .

[14]  Gilles Brassard,et al.  Quantum cryptography: Public key distribution and coin tossing , 2014, Theor. Comput. Sci..

[15]  P. Winzer,et al.  Capacity Limits of Optical Fiber Networks , 2010, Journal of Lightwave Technology.

[16]  A R Dixon,et al.  Efficient decoy-state quantum key distribution with quantified security. , 2013, Optics express.

[17]  Nicolas Gisin,et al.  Quantum key distribution and 1 Gbps data encryption over a single fibre , 2009, 0912.1798.

[18]  A R Dixon,et al.  Field test of quantum key distribution in the Tokyo QKD Network. , 2011, Optics express.

[19]  Hao Qin,et al.  Coexistence of continuous variable QKD with intense DWDM classical channels , 2014, 1412.1403.

[20]  Paul D. Townsend,et al.  Quantum information to the home , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[21]  Dong Liu,et al.  Field and long-term demonstration of a wide area quantum key distribution network , 2014, Optics express.

[22]  B. Zhu,et al.  Seven-core multicore fiber transmissions for passive optical network. , 2010, Optics express.

[23]  Andrew Sharpe,et al.  Field trial of a quantum secured 10 Gb/s DWDM transmission system over a single installed fiber. , 2014, Optics express.

[24]  Matsuo Shoichiro,et al.  Multicore fibers for large capacity transmission , 2014 .

[25]  Momtchil Peev,et al.  Quantum Metropolitan Optical Network based on Wavelength Division Multiplexing , 2014, Optics express.

[26]  Shoichiro Matsuo,et al.  Multicore fibers for large capacity transmission , 2013 .