Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physical Review A

Noiseless amplification of optical images

Mikhail I. Kolobov, Luigi Lugiato

Published Dec 1, 1995• 65 citations
Publisher

Abstract

We propose a scheme for amplification of faint optical images with coherent light which preserves the signal-to-noise ratio in the image. The scheme consists of a ring-cavity optical parametric amplifier as an active element and two imaging lenses. This system can amplify images either ``point by point,'' when a small region is amplified at a time, or by narrow rings, depending on its operation; in both cases it works as an image scanner. We have evaluated the inherent noise of this amplification scheme which has its physical origin in the phenomenon of spontaneous parametric radiation. This noise gives a lower ultimate limit for the intensity of the image that can be noiselessly amplified by our scheme. We have estimated spatial resolution of the scheme and formulated criteria for its noiseless operation.

DOI
10.1103/physreva.52.4930

Related papers

Parametric Image Amplification in Optical Cavities

S. Mancini, A. Gatti, L.A. Lugiato

We show the possibility of noiseless amplification of an optical image in cavities containing a parametric oscillator. We consider a confocal ring cavity with plane mirrors and compare with the case of planar cavity. In the latter case the system operates with severe spatial limitations, while in the confocal case, there is the possibility of preserving the signal-to-noise ratio while amplifying uniformely the entire image.

Fortschritte der Physik•May 1, 2000•0 citations

Parametric Image Amplification in Optical Cavities

S. Mancini, A. Gatti, L.A. Lugiato

We show the possibility of noiseless amplification of an optical image in cavities containing a parametric oscillator. We consider a confocal ring cavity with plane mirrors and compare with the case of planar cavity. In the latter case the system operates with severe spatial limitations, while in the confocal case, there is the possibility of preserving the signal-to-noise ratio while amplifying uniformely the entire image.

arXiv:quant-ph/9907083•Fortschritte der Physik•May 1, 2000•0 citations

Quantum fluctuations in traveling-wave amplification of optical images

I. V. Sokolov, Mikhail I. Kolobov, Luigi Lugiato

We investigate amplification of optical images by means of a traveling-wave optical parametric amplifier. As shown recently for a cavity-based geometry, such a scheme can amplify images without deteriorating their signal-to-noise ratio thus working as a noiseless amplifier. Here we consider a configuration without cavity, which is more realistic for a possible experimental realization. We study in detail the quantum fluctuations of the amplifier and formulate criteria for its noiseless performance. We investigate physical features of noiseless amplification, which take place for both traveling-wave and ring-cavity configurations. We demonstrate how the optimum phase matching of a phase-sensitive wave front of an image (by means of a thin lens or a small displacement of the crystal) can improve the noise performance of the amplifier and bring it to the ultimate value achievable under given physical conditions. We discuss the possibility of using detectors with the area much smaller than the area of the input image elements. We compare our results with those obtained for the ring-cavity configuration.

Physical Review A•Sep 1, 1999•35 citations

Parametric image amplification in optical cavities

Stefano Mancini, A. Gatti, Luigi A. Lugiato

We show the possibility of noiseless amplification of an optical image in cavities containing a parametric oscillator. We consider a confocal ring cavity with plane miners and compare with the case of planar cavity. ln the latter case the system operates with severe spatial limitations, while in the confocal case, there is the possibility of preserving the signal-to-noise ratio while amplifying uniformely the entire image.

•Jan 1, 1999•0 citations

Quantum fluctuation in traveling-wave amplification of optical images

I. V. Sokolov, Mikhail I. Kolobov, Luigi A. Lugiato

We investigate amplification of optical images by means of a traveling-wave optical parametric amplifier. As shown recently by Kolobov and Lugiato [Phys. Rev. A 52, 4930 (1995)] for a cavity-based geometry, such a scheme can amplify images, without deteriorating their sign-to-noise ratio, thus working as a noiseless amplifier. Here we consider a configuration without cavity, which is more realistic for a possible experimental realization. We investigate in detail the quantum fluctuations of the amplifier and formulate criteria for its noiseless performance. The spatial resolution power, which guarantees noiseless amplification is estimated. We demonstrate how the optimum phase matching of a phase-sensitive wavefront of the image can improve the noise performance of the amplifier and bring it to the ultimate value achievable under given physical conditions. We discuss the effect of improvement of the signal-to-noise ratio in the case of observation of both the input and the amplified image, with an ideal photodetector of small area (i.e., much less than the coherence area of the amplifier). This improvement is due to the fact that the signal-to-noise ratio in the input is deteriorated by the observation with the photodetector of small area.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Feb 25, 1999•1 citation

Controlling the signal-to-noise ratio in optical parametric image amplification

Kaige Wang, Guojian Yang, A. Gatti +1 more

We analyse a scheme for phase-sensitive amplification of an optical image without using Fourier-transforming lenses, as carried out in a recent experiment. Our analysis shows that the scheme works well with a broadband amplifier, which ensures that the output image is a faithful copy of the object. In addition, when the area of the pixel detector is close to the minimum imaging resolution, both a large output signal-to-noise ratio and noiseless amplification can be realized.

Journal of Optics B Quantum and Semiclassical Optics•Aug 1, 2003•12 citations
We propose a scheme for amplification of faint optical images with coherent light which preserves the signal-to-noise ratio in the image. The scheme consists of a ring-cavity optical parametric amplifier as an active element and two imaging lenses. This system can amplify images either ``point by point,'' when a small region is amplified at a time, or by narrow rings, depending on its operation; in both cases it works as an image scanner. We have evaluated the inherent noise of this amplification scheme which has its physical origin in the phenomenon of spontaneous parametric radiation. This noise gives a lower ultimate limit for the intensity of the image that can be noiselessly amplified by our scheme. We have estimated spatial resolution of the scheme and formulated criteria for its noiseless operation.
We investigate amplification of optical images by means of a traveling-wave optical parametric amplifier. As shown recently for a cavity-based geometry, such a scheme can amplify images without deteriorating their signal-to-noise ratio thus working as a noiseless amplifier. Here we consider a configuration without cavity, which is more realistic for a possible experimental realization. We study in detail the quantum fluctuations of the amplifier and formulate criteria for its noiseless performance. We investigate physical features of noiseless amplification, which take place for both traveling-wave and ring-cavity configurations. We demonstrate how the optimum phase matching of a phase-sensitive wave front of an image (by means of a thin lens or a small displacement of the crystal) can improve the noise performance of the amplifier and bring it to the ultimate value achievable under given physical conditions. We discuss the possibility of using detectors with the area much smaller than the area of the input image elements. We compare our results with those obtained for the ring-cavity configuration.
We investigate amplification of optical images by means of a traveling-wave optical parametric amplifier. As shown recently by Kolobov and Lugiato [Phys. Rev. A 52, 4930 (1995)] for a cavity-based geometry, such a scheme can amplify images, without deteriorating their sign-to-noise ratio, thus working as a noiseless amplifier. Here we consider a configuration without cavity, which is more realistic for a possible experimental realization. We investigate in detail the quantum fluctuations of the amplifier and formulate criteria for its noiseless performance. The spatial resolution power, which guarantees noiseless amplification is estimated. We demonstrate how the optimum phase matching of a phase-sensitive wavefront of the image can improve the noise performance of the amplifier and bring it to the ultimate value achievable under given physical conditions. We discuss the effect of improvement of the signal-to-noise ratio in the case of observation of both the input and the amplified image, with an ideal photodetector of small area (i.e., much less than the coherence area of the amplifier). This improvement is due to the fact that the signal-to-noise ratio in the input is deteriorated by the observation with the photodetector of small area.