Experimental evaluation of the impairments on a QKD system in a 20-channel WDM co-existence scheme

Karinou, Fotini; Comandar, Lucian C.; Brunner, Hans H.; Hillerkuss, D.; Fung, Fred; Bettelli, S.; Mikroulis, S.; Wang, D.; Qian, Yi; Kuschnerov, Maxim; Xie, Chen; Poppe, Andreas; Peev, Momtchil

doi:10.1109/phosst.2017.8012692

Cited by 9 publications

(6 citation statements)

References 4 publications

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“…Excellent spectral filtering capability inherent in homodyne/ heterodyne measurements suppresses crosstalk in wavelength division multiplexing (WDM) channels. This allows multiplexing of hundreds of QKD channels into a single optical fiber 8 as well as co-propagation with classical data channels [9][10][11][12][13][14][15] , which makes integration into existing communication network easier.…”

mentioning

confidence: 99%

Finite-size security of continuous-variable quantum key distribution with digital signal processing

et al. 2021

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In comparison to conventional discrete-variable (DV) quantum key distribution (QKD), continuous-variable (CV) QKD with homodyne/heterodyne measurements has distinct advantages of lower-cost implementation and affinity to wavelength division multiplexing. On the other hand, its continuous nature makes it harder to accommodate to practical signal processing, which is always discretized, leading to lack of complete security proofs so far. Here we propose a tight and robust method of estimating fidelity of an optical pulse to a coherent state via heterodyne measurements. We then construct a binary phase modulated CV-QKD protocol and prove its security in the finite-key-size regime against general coherent attacks, based on proof techniques of DV QKD. Such a complete security proof is indispensable for exploiting the benefits of CV QKD.

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confidence: 99%

Finite-size security of continuous-variable quantum key distribution with digital signal processing

et al. 2021

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“…Fröhlich et al [87] demonstrated the coexistence of quantum signals at 1548.51 nm with 100 Gb/s data signals within the C-band in a 150 km optical fiber. In [246], the coexistence of a quantum channel hosted at 1550 nm along with 20 classical channels (including 4×100 Gb/s and 16×10 Gb/s) in the C-band of a SMF was experimentally investigated. In [247], the co-propagation of a quantum channel centred at 1549.2 nm and seven 12.5 Gb/s classical channels hosted in the C-band over a 10 km single fiber was investigated, achieving a secret-key rate in the range of 20 to 50 kbps.…”

Section: A Co-fiber Transmissionmentioning

confidence: 99%

The Evolution of Quantum Key Distribution Networks: On the Road to the Qinternet

Cao

Zhao

Qin

et al. 2022

IEEE Commun. Surv. Tutorials

140

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“…On the other hand, CV-QKD protocols encode information to quadrature in the phase space of an optical pulse. They use homodyne or heterodyne detection [3,4], which is highly compatible with the coherent optical communication technology currently widespread in industry [5][6][7][8][9][10][11][12][13][14]. See [15,16] for comprehensive reviews of the topic.…”

Section: Introductionmentioning

confidence: 99%

Finite-size security proof of binary-modulation continuous-variable quantum key distribution using only heterodyne measurement

Yamano,

Matsuura,

Kuramochi

et al. 2024

Phys. Scr.

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Continuous-variable quantum key distribution (CV-QKD) has many practical advantages including compatibility with current optical communication technology. Implementation using heterodyne measurements is particularly attractive since it eliminates the need for active phase locking of the remote pair of local oscillators, but the full security of CV QKD with discrete modulation was only proved for a protocol using homodyne measurements. Here we propose an all-heterodyne CV-QKD protocol with binary modulation and prove its security against general attacks in the ﬁnite-key regime. Although replacing a homodyne measurement with a heterodyne measurement would be naively expected to incur a 3-dB penalty in the rate-distance curve, our proof achieves a key rate with only a 1-dB penalty.

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Experimental evaluation of the impairments on a QKD system in a 20-channel WDM co-existence scheme

Cited by 9 publications

References 4 publications

Finite-size security of continuous-variable quantum key distribution with digital signal processing

Finite-size security of continuous-variable quantum key distribution with digital signal processing

The Evolution of Quantum Key Distribution Networks: On the Road to the Qinternet

Finite-size security proof of binary-modulation continuous-variable quantum key distribution using only heterodyne measurement

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