Quantum key distribution without a single-photon source using a strong reference

@article{Guerreau2005QuantumKD,
  title={Quantum key distribution without a single-photon source using a strong reference},
  author={O. L. Guerreau and F. J. Malassenet and S. W. McLaughlin and J.-M. Merolla},
  journal={IEEE Photonics Technology Letters},
  year={2005},
  volume={17},
  pages={1755-1757}
}
We present a single-sideband scheme that uses an enhanced BB84 protocol with a strong reference. A matrix method allows us to prove that this reference makes the system secure against the photon number splitting attack when using an imperfect laser source. The performance of a stable experimental setup with a fainted laser source is tested using an optimum average energy /spl mu/=1 photon per pulse to maximize the final key rate.