K. Bencheikh et al., QUANTUM-NOISE REDUCTION IN QUASI-PHASE-MATCHED OPTICAL PARAMETRIC AMPLIFICATION, Journal of the Optical Society of America. B, Optical physics, 12(5), 1995, pp. 847-852
We present a calculation of quantum noise for parametric amplification
in periodically inverted nonlinear media. An analytical expression is
obtained for the noise figure of the amplifier. We show that such opt
ical parametric amplifiers run in a phase-sensitive configuration can
achieve noiseless amplification and squeezing, thus constituting a pro
mising wag for the integration of noiseless optical amplifiers in a co
mmunication line.