Reduction of quantum fluctuation and suppression of the Gordon-Haus effect with phase-sensitive linear amplifiers.

@article{Yuen1992ReductionOQ,
  title={Reduction of quantum fluctuation and suppression of the Gordon-Haus effect with phase-sensitive linear amplifiers.},
  author={Horace P. Yuen},
  journal={Optics letters},
  year={1992},
  volume={17 1},
  pages={73-5}
}
Compared with the use of phase-insensitive linear quantum amplifiers of the same gain G, the use of phase-sensitive linear amplifiers on phase coherent classical light sources in an amplifier-attenuator chain reduces the total quantum noise power by a factor of 4, the homodyne noise variance by 2, and the photon number variance by 2-8 and suppresses the Kerr effect linear phase fluctuation variance as well as the soliton timing-error variance by 2G(2). 
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