Measurement of quantum-noise correlations in parametric image amplification

Michael L. Marable*, Sang Kyung Choi, Prem Kumar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


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 ≃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.

Original languageEnglish (US)
Pages (from-to)84-92
Number of pages9
JournalOptics Express
Issue number3
StatePublished - Feb 1998

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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