OBSERVATION OF BACKACTION-EVADING MEASUREMENT OF AN OPTICAL-INTENSITY IN A 3-LEVEL ATOMIC NONLINEAR-SYSTEM

被引：84

作者：

GRANGIER, P

ROCH, JF

ROGER, G

机构：

[1] Institut d'Optique, F91403 Orsay, CEDEX

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.66.1418

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Backaction-evading measurement of an optical intensity has been observed, using a three-level system in a sodium atomic beam as a nonlinear medium. The principle of this experiment is to use the cross-phase-modulation effect, which in principle allows one to read nondestructively the quantum intensity fluctuations of the "signal" beam when detecting the phase fluctuations of the "meter" beam. Using a cavity-enhancement scheme, the quantum noise measured when recombining the signal and meter photocurrents is 0.8 dB below the shot-noise level.

引用

页码：1418 / 1421

页数：4

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