Open AccessMeasurement of quantum-noise correlations in parametric image amplification
Author(s) -
M. Marable,
Sang Kyung Choi,
Prem Kumar
Publication year - 1998
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.2.000084
Subject(s) - physics , optics , optical parametric amplifier , quantum noise , shot noise , parametric statistics , noise (video) , quantum amplifier , optical amplifier , amplifier , noise temperature , parametric oscillator , phase noise , quantum , laser , image (mathematics) , optoelectronics , mathematics , quantum information , quantum mechanics , computer science , quantum error correction , statistics , cmos , artificial intelligence , detector
We demonstrate quantum-noise correlations between the spatial frequencies of a parametrically amplified signal image and the generated conjugate (idler) image. Test images were amplified by an optical parametric amplifier that can be operated either as a low-pass or a band-pass amplifier for spatial frequencies. Direct difference detection of the signal and idler spatial frequencies at +- 16 mm{;{-1}} resulted in noise that fell below the shot-noise level by approx. 5 dB. Parametric-gain and phase-mismatch dependence of the observed quantum-noise reduction is in good agreement with the theory of a spatially-broadband optical parametric amplifier.