期刊
OPTICS LETTERS
卷 41, 期 3, 页码 653-656出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.41.000653
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资金
- State Key Development Program for Basic Research of China [2014CB340103]
- National NSF of China [11527808]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20120032110055]
- PCSIRT
- 111 Project [B07014]
We demonstrate the experimental generation of quadrature amplitude entanglement in the 1550 nm band by using a fiber optical parametric amplifier. The measured noise variances of the difference and sum of the quadrature amplitudes of the pulsed signal and idler twin beams fall below the shot noise limit by about 1 and 0.8 dB (4.2 and 3.6 dB after the correction for efficiency), respectively, showing that the inseparability criterion of Einstein-PodolskyRosen entanglement I < 2 is satisfied. Our investigation reveals that the quality of the measured entanglement can be further improved by increasing the transmission efficiency of the twin beams and by optimizing the temporal mode matching of the two sets of homodyne detection systems. (C) 2016 Optical Society of America
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