Quantum key distribution for 10 Gb/s dense wavelength division multiplexing networks

@article{Patel2014QuantumKD,
  title={Quantum key distribution for 10 Gb/s dense wavelength division multiplexing networks},
  author={K. A. Patel and James F. Dynes and Marco Lucamarini and Iris Choi and A. W. Sharpe and Z. L. Yuan and Richard Vincent Penty and Andrew J. Shields},
  journal={Applied Physics Letters},
  year={2014},
  volume={104},
  pages={051123}
}
We demonstrate quantum key distribution (QKD) with bidirectional 10 Gb/s classical data channels in a single fiber using dense wavelength division multiplexing. Record secure key rates of 2.38 Mbps and fiber distances up to 70 km are achieved. Data channels are simultaneously monitored for error-free operation. The robustness of QKD is further demonstrated with a secure key rate of 445 kbps over 25 km, obtained in the presence of data lasers launching conventional 0 dBm power. We discuss the… 
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References

SHOWING 1-10 OF 25 REFERENCES
Simultaneous quantum cryptographic key distribution and conventional data transmission over installed fibre using wavelength-division multiplexing
TLDR
Wavelength division multiplexing is used to add a secure quantum key distribution channel to a conventional 1.2 Gbit/s data channel operating over 28 km of installed fibre in BT's London and East Anglia multiservice network testbed (LEANET).
2 GHz clock quantum key distribution over 260 km of standard telecom fiber.
TLDR
A demonstration of quantum key distribution (QKD) over a standard telecom fiber exceeding 50 dB in loss and 250 km in length is reported, with careful optimization of the 1 bit delayed Faraday-Michelson interferometer and the use of the superconducting single photon detector (SSPD).
High-speed wavelength-division multiplexing quantum key distribution system.
TLDR
A three-channel WDM system that simultaneously uses avalanche photodiodes and superconducting single-photon detectors is demonstrated and achieved 12 h continuous key generation with a secure key rate of 208 kilobits per second through a 45 km field fiber with 14.5 dB loss.
Coexistence of High-Bit-Rate Quantum Key Distribution and Data on Optical Fiber
TLDR
This work exploits a novel temporal-filtering effect for noisephoton rejection that allows high-bit-rate QKD over fibers up to 90 km in length and populated with error-free bidirectional Gb=s data communications.
Experimental characterization of the separation between wavelength-multiplexed quantum and classical communication channels
TLDR
The minimum wavelength separation for multiplexing QKD and WDM channels on a shared fiber is experimentally determined for impairment-free QKKD+WDM transmission.
Feasibility of quantum key distribution through a dense wavelength division multiplexing network
In this paper, we study the feasibility of conducting quantum key distribution (QKD) together with classical communication through the same optical fiber by employing
Quantum key distribution and 1 Gbps data encryption over a single fibre
TLDR
This work performs quantum key distribution over a single fibre in the presence of four classical channels in a C-band dense wavelength division multiplexing (DWDM) configuration using a commercial QKD system, successfully distil secret keys over fibre spans of up to 50 km.
Simultaneous transmission of 20x2 WDM/SCM-QKD and 4 bidirectional classical channels over a PON
TLDR
The experimental results allow us to determine the minimum rejection ratio required by the filtering devices employed to select each quantum channel and maximize the quantum key rate, and open the path towards high-count QKD channel transmission over optical fiber infrastructures.
Dense wavelength multiplexing of 1550 nm QKD with strong classical channels in reconfigurable networking environments
To move beyond dedicated links and networks, quantum communications signals must be integrated into networks carrying classical optical channels at power levels many orders of magnitude higher than
Active polarization control for quantum communication in long‐distance optical fibers with shared telecom traffic
We experimentally demonstrate the compatibility of wavelength multiplexed active polarization stabilization for quantum communication in an optical fiber carrying telecom traffic. One of the feedback
...
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