QUANTUM NOISE-REDUCTION IN OPTICAL AMPLIFICATION

被引：96
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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