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Quantum Imaging and Phase Sensitive Optical Amplification

Paul D. Lett, Neil Corzo, Alberto M. Marino +1 more

We have constructed a phase sensitive optical amplifier based on four-wave mixing in rubidium vapor. This low-gain amplifier operates in the quantum regime and is capable of noiseless amplification of images.

Imaging and Applied OpticsJan 1, 20130 citations

Quantum Imaging with light from Four-Wave Mixing

Paul D. Lett, Neil Corzo, Alberto M. Marino +1 more

We have constructed a phase sensitive optical amplifier based on four-wave-mixing in rubidium vapor. This low-gain amplifier operates in the quantum regime and is capable of noiseless amplification of images.

The Rochester Conferences on Coherence and Quantum Optics and the Quantum Information and Measurement meetingJan 1, 20130 citations

Multi-Spatial-Mode Noiseless Optical Amplifier

Alberto M. Marino, Neil Corzo, K. M. Jones +1 more

We implement a noiseless optical amplifier through a phase-sensitive four-wave mixing process in rubidium vapor and show that it does not significantly degrade the signal-to-noise ratio. Preliminary results show its multi-spatial-mode nature.

Frontiers in OpticsJan 1, 20110 citations

Noiseless Optical Amplification of Images

Sang-Kyung Choi, Michael Vasilyev, Prem Kumar

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 $\ensuremath{\simeq}2.5$, we measured noise-figure values of ( $0.2\ifmmode\pm\else\textpm\fi{}0.6$) and ( $0.4\ifmmode\pm\else\textpm\fi{}0.5$) 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.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 $\ensuremath{\simeq}2.5$, we measured noise-figure values of ( $0.2\ifmmode\pm\else\textpm\fi{}0.6$) and ( $0.4\ifmmode\pm\else\textpm\fi{}0.5$) 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.

Physical Review LettersSep 6, 1999135 citations

Quantum Images from 4-Wave Mixing in Atomic Vapors

Paul D. Lett, Alberto M. Marino, Neil Corzo +1 more

We have used four-wave mixing in hot atomic vapors to generate multi-spatial-mode entangled optical fields. I will review and discuss our recent progress in the construction of phase-sensitive and phase-insensitive amplifiers with this technique.

Research in Optical SciencesJan 1, 20120 citations

Noiseless Optical Amplifier Operating on Hundreds of Spatial Modes

Neil Corzo, Alberto M. Marino, K. M. Jones +1 more

We implement a noiseless optical amplifier using a phase-sensitive four-wave mixing process in rubidium vapor. We observe performance near the quantum limit for this type of amplifier over a range of experimental parameters and show that the noise figure is always better than would be obtained with a phase-insensitive amplifier with the same gain. Additionally, we observe that the amplifier supports hundreds of spatial modes, making it possible to amplify complex two-dimensional spatial patterns with less than a 10% degradation of the input signal-to-noise ratio for gains up to 4.6. To confirm the multimode character of the amplifier, we study the noise figure as a function of spatially-varying losses. Additionally, we investigate the spatial resolution of the amplifier and show that it supports a range of spatial frequencies from 1.3 to more than 35 line pairs per millimeter.We implement a noiseless optical amplifier using a phase-sensitive four-wave mixing process in rubidium vapor. We observe performance near the quantum limit for this type of amplifier over a range of experimental parameters and show that the noise figure is always better than would be obtained with a phase-insensitive amplifier with the same gain. Additionally, we observe that the amplifier supports hundreds of spatial modes, making it possible to amplify complex two-dimensional spatial patterns with less than a 10% degradation of the input signal-to-noise ratio for gains up to 4.6. To confirm the multimode character of the amplifier, we study the noise figure as a function of spatially-varying losses. Additionally, we investigate the spatial resolution of the amplifier and show that it supports a range of spatial frequencies from 1.3 to more than 35 line pairs per millimeter.

Physical Review LettersJul 26, 201297 citations

Noiseless Amplification of Images by Four-Wave Mixing

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Noiseless Amplification of Images by Four-Wave Mixing

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