Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physical Review Letters

Quantum optical cloning amplifier

Juan Ariel Levenson, Izo I. Abram, Thomas Rivera, P. Fayolle, Jean Claude Garreau, Philippe Grangier

Published Jan 18, 1993• 130 citations
Publisher

Abstract

We demonstrate experimentally that a type-II pulsed optical parametric amplifier can duplicate (or, clone) a signal in the quadrature it amplifies. Although this device is an amplifier with large gain, it meets the quantitative criteria for quantum nondemolition measurements and, thus, operates in the nonclassical regime. It can be used as a noiseless amplifying optical tap which, at the same time, can overcome the noise introduced downstream by propagation and detection losses.

DOI
10.1103/physrevlett.70.267

Related papers

Quantum optical repeaters

Philippe Grangier, J.-Ph. Poizat, Jean-François Roch +5 more

We demonstrate experimentally two devices that can manipulate an information‐carrying light beam below the usual shot‐noise limit. The first one is a type II pulsed optical parametric amplifier, which can duplicate (or, clone) the signal it amplifies. The second one uses semiconductor emitters and receivers, and is able to ‘‘re‐create’’ a light beam after direct detection. Although both devices are amplifiers with large gain, they meet the quantitative criteria for Quantum Non‐Demolition measurements and, thus, operate in the non‐classical regime. They can be used as noiseless amplifying optical taps which, at the same time, can overcome the noise introduced by downstream propagation and detection losses.

AIP conference proceedings•Jan 1, 1993•0 citations

Reduction of quantum noise in optical parametric amplification

Juan Ariel Levenson, Philippe Grangier, Izo I. Abram +1 more

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.

Journal of the Optical Society of America B•Nov 1, 1993•170 citations

Cascaded Amplifying Quantum Optical Taps: A Robust Noiseless Optical Bus

Kamel Bencheikh, C. Simonneau, Juan Ariel Levenson

Two identical amplifying quantum optical taps, based on noiseless optical parametric amplification and twin beam quantum correlation, have been implemented in a series configuration and experimentally investigated. The result is an optical bus which we have shown to be robust with respect to downstream losses.

Physical Review Letters•Jan 6, 1997•26 citations

Quantum amplification and quantum optical tapping with squeezed states and correlated quantum states

Z. Y. Ou, Silvania F. Pereira, Harry J. Kimble

Quantum fluctuations in a nondegenerate optical parametric amplifier (NOPA) are investigated experimentally with a squeezed state coupled into the internal idler mode of the NOPA. Reductions of the inherent quantum noise of the amplifier are observed with a minimum noise level 0.7 dB below the usual noise level of the amplifier with its idler mode in a vacuum state. With two correlated quantum fields as the amplifier's inputs and proper adjustment of the gain of the amplifier, it is shown that the amplifier's intrinsic quantum noise can be completely suppressed so that noise-free amplification is achieved. It is also shown that the NOPA, when coupled to either a squeezed state or a nonclassically correlated state, can realize quantum tapping of optical information.

•May 1, 1994•0 citations

Quantum nondemolition measurements and generation of individually squeezed twin beams by a degenerate optical parametric amplifier

Stephan Schiller, Robert Bruckmeier, Manfred Schalke +2 more

A novel scheme for continuous-wave quantum nondemolition (QND) detection of optical-amplitude quadratures is implemented using a degenerate optical parametric amplifier. A monolithic ring resonator with optimizable frustrated total internal reflection coupling is used. Signal and meter output beams are squeezed by 0.5 dB and 2.2 dB, and 38% correlated. This implies the first realization of individually squeezed twin beams, as well as quantum state preparation ability for both output beams. A quantum optical tap efficiency T s + T m = 1.08 is achieved. The all-solid-state system was completely stabilized and continuously operated as a QND device for up to 36 hours.

Europhysics Letters (EPL)•Nov 10, 1996•16 citations

Observation of Noiseless Image Amplification by an Optical Parametric Amplifier

Sang-Kyung Choi, Michael Vasilyev, Prem Kumar

A spatially-broadband optical parametric amplifier is used for image amplification. In the phase-sensitive configuration, we observe a noise figure of −0.1± 0.3dB for a gain of 2.4, which is 2dB lower than the quantum limit for an ideal phase-insensitive amplifier. Image pre-amplification before loss is shown to improve the detected signal-to-noise ratio.

Kluwer Academic Publishers eBooks•Dec 19, 2005•1 citation
We demonstrate experimentally that a type-II pulsed optical parametric amplifier can duplicate (or, clone) a signal in the quadrature it amplifies. Although this device is an amplifier with large gain, it meets the quantitative criteria for quantum nondemolition measurements and, thus, operates in the nonclassical regime. It can be used as a noiseless amplifying optical tap which, at the same time, can overcome the noise introduced downstream by propagation and detection losses.
We demonstrate experimentally two devices that can manipulate an information‐carrying light beam below the usual shot‐noise limit. The first one is a type II pulsed optical parametric amplifier, which can duplicate (or, clone) the signal it amplifies. The second one uses semiconductor emitters and receivers, and is able to ‘‘re‐create’’ a light beam after direct detection. Although both devices are amplifiers with large gain, they meet the quantitative criteria for Quantum Non‐Demolition measurements and, thus, operate in the non‐classical regime. They can be used as noiseless amplifying optical taps which, at the same time, can overcome the noise introduced by downstream propagation and detection losses.
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.
Quantum fluctuations in a nondegenerate optical parametric amplifier (NOPA) are investigated experimentally with a squeezed state coupled into the internal idler mode of the NOPA. Reductions of the inherent quantum noise of the amplifier are observed with a minimum noise level 0.7 dB below the usual noise level of the amplifier with its idler mode in a vacuum state. With two correlated quantum fields as the amplifier's inputs and proper adjustment of the gain of the amplifier, it is shown that the amplifier's intrinsic quantum noise can be completely suppressed so that noise-free amplification is achieved. It is also shown that the NOPA, when coupled to either a squeezed state or a nonclassically correlated state, can realize quantum tapping of optical information.
A novel scheme for continuous-wave quantum nondemolition (QND) detection of optical-amplitude quadratures is implemented using a degenerate optical parametric amplifier. A monolithic ring resonator with optimizable frustrated total internal reflection coupling is used. Signal and meter output beams are squeezed by 0.5 dB and 2.2 dB, and 38% correlated. This implies the first realization of individually squeezed twin beams, as well as quantum state preparation ability for both output beams. A quantum optical tap efficiency T s + T m = 1.08 is achieved. The all-solid-state system was completely stabilized and continuously operated as a QND device for up to 36 hours.