Noiseless optical amplification of images

Sang Kyung Choi, Michael Vasilyev, Prem Kumar

Research output: Contribution to journalArticlepeer-review

147 Scopus citations


We used a spatially broadband optical parametric amplifier for image amplification. In the phase-sensitive configuration of the amplifier, we observed noiseless amplification of input images. For a gain of ≃2.5, we measured noise-figure values of (0.2°0.6) and (0.4°0.5) dB, respectively, for two amplifiers of different lengths. These experimental values agree with theory (for an ideal noiseless amplifier the noise figure is 0 dB) and are almost 2 dB lower than the quantum limit of an ideal phase-insensitive amplifier.

Original languageEnglish (US)
Pages (from-to)1938-1941
Number of pages4
JournalPhysical review letters
Issue number10
StatePublished - 1999

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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