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Proceedings Paper

Quantum fluctuation in traveling-wave amplification of optical images
Author(s): Ivan V. Sokolov; Mikhail I. Kolobov; Luigi A. Lugiato
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Paper Abstract

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.

Paper Details

Date Published: 25 February 1999
PDF: 12 pages
Proc. SPIE 3736, ICONO '98: Quantum Optics, Interference Phenomena in Atomic Systems, and High-Precision Measurements, (25 February 1999); doi: 10.1117/12.340106
Show Author Affiliations
Ivan V. Sokolov, St. Petersburg Univ. (Russia)
Mikhail I. Kolobov, St. Petersburg Univ. and Univ.-Gesamthochschule Essen (Germany) (Russia)
Luigi A. Lugiato, Univ. degli Studi di Milano (Italy)


Published in SPIE Proceedings Vol. 3736:
ICONO '98: Quantum Optics, Interference Phenomena in Atomic Systems, and High-Precision Measurements

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