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Habilitation à diriger des recherches

Optique quantique dans les oscillateurs paramétriques optiques : du monomode au multimode

Abstract : Optical images are currently monitored by multipixel detectors. Each pixel displays the intensity of a transverse part of the beam, which can be considered as a single information signal. Therefore light, as far its transverse characteristics are considered, may carry parallel information. Transverse quantum optics makes it possible to exploit at the same time the quantum properties of light and its paralellism.
The visibility and quality of optical images is ultimately limited not by diffraction but by the quantum noise affecting each pixel. For example, if the light is in a coherent state, each pixel exhibits a ‘local' shot noise and the cross-correlation between different pixels is zero. Multimode non-classical states of light, characterized by spatial quantum correlation or local reduced quantum noise, permit in principle to go beyond the standard quantum limit and therefore to improve transverse optical resolution. In the case of lateral beam displacement, the measurement performed with a coherent beam is limited by shot noise. We have proved both theoretically [1] and experimentally [2] that the standard quantum limit can be overcome with a non classical multitransverse beam. It has been also predicted that Optical Parametric Oscillators (OPO) operating simultaneously on many transverse modes are good candidates for generating multimode non-classical states of light. We perform an experiment with an OPO in the c.w. regime, showing that a transverse degenerate OPO emits such states [3].
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Habilitation à diriger des recherches
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Contributor : Agnès Maitre <>
Submitted on : Thursday, March 13, 2003 - 8:22:02 PM
Last modification on : Thursday, December 10, 2020 - 12:37:49 PM
Long-term archiving on: : Friday, April 2, 2010 - 8:06:55 PM


  • HAL Id : tel-00002555, version 1


Agnès Maître. Optique quantique dans les oscillateurs paramétriques optiques : du monomode au multimode. Physique Atomique [physics.atom-ph]. Université Paris-Diderot - Paris VII, 2002. ⟨tel-00002555⟩



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