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Reduction of quantum noise in optical parametric amplification

Abstract : We experimentally demonstrate that a type-II pulsed optical parametric amplifier operated in a phase-insensitive configuration works as a near-perfect classical optical amplifier whose noise figure approaches 3 dB at high gains. We further demonstrate that, when operated in a phase-sensitive configuration, this amplifier works as a quantum-optical amplifier whose noise figure goes below 3 dB and approaches 0 dB at high gains. The noise figure of 1.45 + 0.2 dB, measured for a gain of 9 dB, is clearly in the quantum regime.
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Juan Ariel Levenson, Izo Abram, Thomas Rivera, Philippe Grangier. Reduction of quantum noise in optical parametric amplification. Journal of the Optical Society of America B, Optical Society of America, 1993, 10 (11), pp.2233-2238. ⟨hal-00870996⟩



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