Coexistence of continuous variable QKD with intense DWDM classical channels
By Rupesh Kumar, Hao Qin, Romain Alléaume. 2014
196 citations recorded by the source corpus.
We demonstrate experimentally the feasibility of continuous variable quantum key distribution (CV-QKD) in dense-wavelength-division multiplexing networks (DWDM), where QKD will typically have to coexist with several co-propagating (forward or backward) C-band classical channels whose launch power is around 0 dBm. We have conducted experimental tests of the coexistence of CV-QKD multiplexed with an intense classical channel, for different input powers and different DWDM wavelengths. Over a 25 km fiber, a CV-QKD operated over the 1530.12 nm channel can tolerate the noise arising from up to 11.5 dBm classical channel at 1550.12 nm in the forward direction (9.7 dBm in backward). A positive key rate (0.49 kbits s−1) can be obtained at 75 km with classical channel power of respectively −3 and −9 dBm in forward and backward. Based on these measurements, we have also simulated the excess noise and optimized channel allocation for the integration of CV-QKD in some access networks. We have, for example, shown that CV-QKD could coexist with five pairs of channels (with nominal input powers: 2 dBm forward and 1 dBm backward) over a 25 km WDM-PON network. The obtained results demonstrate the outstanding capacity of CV-QKD to coexist with classical signals of realistic intensity in optical networks.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/86613b6d83f0175f2cfe02ad5eec4bfddf31422e
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In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
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Citations in the corpus
- Distributing Secret Keys with Quantum Continuous Variables: Principle, Security and Implementations (2015, background): “Furthermore, an important practical issue concerns the ability of QKD systems to be integrated into classical network infrastructures by means of wavelength division multiplexing techniques; here, again, CVQKD is a good candidate to achieve this goal, as has been shown recently [97,98].”
- Practical challenges in quantum key distribution (2016, unknown): “First, QKD systems have been shown to coexist with intense data traf fi c in the same fi bre, 64 – 67 thus eliminating the need for dark fi bres that are not only expensive but also often unavailable.”