Experimental Demonstration of a Displacement Measurement of an Optical Beam beyond the Quantum Noise Limit

We experimentally generate a spatially squeezed light beam and realize a small-displacement measurement beyond the quantum noise limit with this squeezed light. Moreover, we measure about -2.2±0.2dB spatial squeezing and reduce the minimum measurable displacement from 1.17A to 0.99A with the signal-...

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Bibliographic Details
Published inChinese physics letters Vol. 31; no. 8; pp. 67 - 70
Main Author 孙恒信 刘尊龙 刘奎 杨荣国 张俊香 郜江瑞
Format Journal Article
LanguageEnglish
Published 01.08.2014
Subjects
Beams (radiation)
Compressing
Displacement
Displacement measurement
Light beams
Noise
Signal to noise ratio
位移测量
光束
压缩光
噪声比
归一化
极限
试验示范
量子噪声
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ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/31/8/084202

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Summary:We experimentally generate a spatially squeezed light beam and realize a small-displacement measurement beyond the quantum noise limit with this squeezed light. Moreover, we measure about -2.2±0.2dB spatial squeezing and reduce the minimum measurable displacement from 1.17A to 0.99A with the signal-to-noise ratio normalized to 1.
Bibliography:11-1959/O4
We experimentally generate a spatially squeezed light beam and realize a small-displacement measurement beyond the quantum noise limit with this squeezed light. Moreover, we measure about -2.2±0.2dB spatial squeezing and reduce the minimum measurable displacement from 1.17A to 0.99A with the signal-to-noise ratio normalized to 1.
SUN Heng-Xin, LIU Zun-Long, LIU Kui, YANG Rong-Guo, ZHANG Jun-Xiang, GAO Jiang-Rui（ State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-E1ectronics Sbanxi University, Taiyuan 030006）
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content type line 23
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/31/8/084202