TY - GEN
T1 - Inter-Core Crosstalk Impact of Classical Channels on CV-QKD in Multicore Fiber Transmission
AU - Eriksson, Tobias A.
AU - Puttnam, Benjamin J.
AU - Rademacher, Georg
AU - Luís, Ruben S.
AU - Takeoka, Masahiro
AU - Awaji, Yoshinari
AU - Sasaki, Masahide
AU - Wada, Naoya
N1 - Funding Information:
If we assume WDM of CV-QKD channels on a 5 GHz grid, we can fit a minimum of 11 channels in the band between the classical channels. If we also assume placing 11 channels before and after the outermost classical channels, a total of 31 bands of CV-QKD channels can be transmitted. This sums up to to a SKR of 15.7 Gbit/s per core for the most conservative assumption of collective attacks and a reconciliation efficiency of β = 0.898. If all six outer cores are used, the SKR may potentially be increased to 94.2 Gbit/s with a classical datarate of 70 Tbit/s, not including the center core since the impact from crosstalk from this core was not covered in our experiments. 5. Conclusions We have measured the excess noise from the crosstalk of 100 GHz spaced WDM 24.5 Gbaud PM-16QAM signals on 1 GHz CV-QKD channels spatially multiplexed in a 19-core fiber. The CV-QKD signals can be placed at wavelengths in the guard-band between the classical channels and has the potential to support 341 QKD channels with 5 GHz spacing between 1537 nm and 1563 nm together with 17 Tbit/s classical data-rate in the three neighboring cores. This work was partly funded by ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan) and the Swedish Research Council (Vetenskapsrådet), Grant No 2017-06179. References 1. C. Cesare, “Encryption faces quantum foe,” Nature, 525(7568), 167, (2015). 2. E. Diamanti, et al., “Practical challenges in quantum key distribution,” npj Quantum Information 2, 16025, (2016). 3. B. J. Puttnam, et al., “Impact of intercore crosstalk on the transmission distance of QAM formats in multicore fibers,” IEEE Phot. J. 8(2), 0601109, (2016). 4. D. Huang, et al., “Continuous variable quantum key distribution with 1 Mbps secure key rate,” Opt. Exp., 23(13), 17 511, (2015). 5. J. F. Dynes, et al., “Ultra-high bandwidth quantum secured data transmission,” Scientific Reports, 6, 35149, (2016). 6. Y. Mao, et al., “Integrating quantum key distribution with classical communications in backbone fiber network,” Opt. Exp., 26(5), 6010, (2018). 7. F. Karinou, et al., “Toward the integration of CV quantum key distribution in deployed optical networks,” IEEE Phot. Tech. Let., 30(7), 650, (2018). 8. T. A. Eriksson, et al., “Joint propagation of continuous variable quantum key distribution and 18 × 24.5 Gbaud PM-16QAM Channels,” in Proc. European Conference on Optical Communication (ECOC), (2018), paper We2.37. 9. T. A. Eriksson, et al., “Coexistence of continuous variable quantum key distribution and 7 × 12.5 Gbit/s classical channels,” IEEE Sum. Top. Met., (2018). 10. J. F. Dynes, et al., “Quantum key distribution over multicore fiber,” Opt. Exp., 24(8), 8081–8087, (2016). 11. D. Bacco, et al., “Space division multiplexing chip-to-chip quantum key distribution,” Scientific Reports, 7(1), 12459, (2017). 12. J. Lodewyck, et al., “Quantum key distribution over 25 km with an all-fiber continuous-variable system,” Phys. Rev. A, 76(4), 042305, (2007). 13. J. Sakaguchi, et al., “305 Tb/s space division multiplexed transmission using homogeneous 19-core fiber,” J. of Light. Tech. 31(4), 554–562, (2013).
© 2019 OSA.
PY - 2019/4/22
Y1 - 2019/4/22
N2 - Crosstalk-induced excess noise is experimentally characterized for continuous-variable quantum key distribution, spatially multiplexed with WDM PM-16QAM channels in a 19-core fiber. The measured noise-sources are used to estimate the secret key rates for different wavelength channels.
AB - Crosstalk-induced excess noise is experimentally characterized for continuous-variable quantum key distribution, spatially multiplexed with WDM PM-16QAM channels in a 19-core fiber. The measured noise-sources are used to estimate the secret key rates for different wavelength channels.
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U2 - 10.1364/ofc.2019.th1j.1
DO - 10.1364/ofc.2019.th1j.1
M3 - Conference contribution
AN - SCOPUS:85062989846
T3 - 2019 Optical Fiber Communications Conference and Exhibition, OFC 2019 - Proceedings
BT - 2019 Optical Fiber Communications Conference and Exhibition, OFC 2019 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 Optical Fiber Communications Conference and Exhibition, OFC 2019
Y2 - 3 March 2019 through 7 March 2019