QUANTUM NOISE-REDUCTION IN OPTICAL AMPLIFICATION

被引：97

作者：

OU, ZY

PEREIRA, SF

KIMBLE, HJ

机构：

[1] Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.70.3239

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quantum fluctuations in optical amplification are investigated with a nondegenerate optical parametric amplifier whose internal idler mode is coupled to a squeezed vacuum. Reductions of the inherent quantum noise of the amplifier are observed with a minimum noise level 0.7 dB below the usual noise level of the amplifier with its internal idler mode in a vacuum state. With a small coherent field as the signal input, the amplified output exhibits an improvement in signal-to-noise ratio of 0.5 dB for the case of a squeezed vacuum as compared to a vacuum state for the amplifier's internal mode.

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页码：3239 / 3242

页数：4

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