Measurement of the squeezed vacuum state by a bichromatic local oscillator

被引：15
|
作者：
Li, Wei [1 ,2 ]
Yu, Xudong [1 ,2 ]
Zhang, Jing [1 ,3 ]
机构：
[1] Shanxi Univ, Inst Optoelect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China
[2] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China
[3] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China
来源：
OPTICS LETTERS | 2015年 / 40卷 / 22期
基金：
中国国家自然科学基金;
关键词：
QUANTUM INFORMATION; METROLOGY; LIGHT;
D O I：
10.1364/OL.40.005299
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present the experimental measurement of a squeezed vacuum state by means of a bichromatic local oscillator (BLO). A pair of local oscillators at +/- 5 MHz around the central frequency. omega(0) of the fundamental field with equal power are generated by three acousto-optic modulators and phase-locked technology and used as a BLO. The squeezed vacuum light is detected by a phase-sensitive balanced-homodyne detection with a BLO. The baseband signal around. omega(0) combined with a broad squeezed field can be detected with the sensitivity below the shot-noise limit, in which the baseband signal is shifted to the vicinity of 5 MHz (the half of the BLO separation). This work has important applications in quantum state measurement and quantum information. (C) 2015 Optical Society of America
引用
收藏
页码：5299 / 5302
页数：4
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