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Réduction du bruit de photon à l'aide d'un asservissement sur des faisceaux jumeaux produits par un oscillateur paramétrique optique

Abstract : We present two experiment that demonstrate intensity noise reduction in light below the standard quantum noise level. A first experiment establishes a reduction of 86 % in the intensity difference noise spectrum of twin beams generated by an Optical Parametric Oscillator. The second experiment exploits this intensity correlation between the twin beams and uses one beam to electro-optically control the other, generating a single beam whose intensity noise is reduced 24 % below the shot noise level. General theories are presented for both processes using a semi-classical input-output formalism. Control configurations are examined where the noise reduction is effected directly from one beam to the other (feedforward), or indirectly through the pump beam (feedback). We determine the maximum amount of noise reduction that may be obtained from active control and detail for these configurations the limitations imposed by constraints of causality and stability. Finally, we demonstrate the equivalence of the semi-classical model with a "corpuscular" photon model in the small fluctuation limit, which we substantiate using Monte-Carlo simulation.
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https://tel.archives-ouvertes.fr/tel-00011880
Contributor : Jacques Dupont-Roc <>
Submitted on : Thursday, March 9, 2006 - 12:57:32 PM
Last modification on : Monday, December 14, 2020 - 9:51:11 AM
Long-term archiving on: : Saturday, April 3, 2010 - 9:18:49 PM

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  • HAL Id : tel-00011880, version 1

Citation

Jérome Mertz. Réduction du bruit de photon à l'aide d'un asservissement sur des faisceaux jumeaux produits par un oscillateur paramétrique optique. Atomic Physics [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 1991. English. ⟨tel-00011880⟩

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