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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 29,
  • Issue 20,
  • pp. 3061-3069
  • (2011)

Impact of Third-Order Intermodulation on the Performance of Subcarrier Multiplexed Quantum Key Distribution

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Abstract

This paper extends the analysis presented in a previous contribution to account for the effect of third-order intermodulation distortion in the system quantum bit error rate attainable in subcarrier multiplexed quantum key distribution (SCM-QKD) systems, showing that under practical conditions this effect can be safely neglected. When the unconditionally secure key distribution rate is computed for BB84 SCM-QKD systems based on weak coherent pulses and strong reference, it is found a per-channel additional decrease due to nonlinear distortions as low as 1% when compared to the dedicated nonmultiplexed BB84 key distribution channels operated under the same conditions.

© 2011 IEEE

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