Generation of high-purity telecom-band entangled photon pairs in dispersion-shifted fiber

被引：93
作者：
Lee, KF [1 ]
Chen, J [1 ]
Liang, C [1 ]
Li, XY [1 ]
Voss, PL [1 ]
Kumar, P [1 ]
机构：
[1] Northwestern Univ, Ctr Photon Commun & Comp, Dept Elect Engn & Comp Sci, Evanston, IL 60208 USA
来源：
OPTICS LETTERS | 2006年 / 31卷 / 12期
关键词：
D O I：
10.1364/OL.31.001905
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We study the purity of correlated photon pairs generated in a dispersion-shifted fiber at various temperatures. The ratio of coincidence to accidental-coincidence counts greater than 100 can be obtained as the fiber is cooled to liquid-nitrogen temperature (77 K). We then generate polarization-entangled photon pairs by using a compact counterpropagating scheme. Two-photon interference with visibility > 98% and Bell's inequality violation by > 8 standard deviations of measurement uncertainty are observed at 77K, without subtracting the accidental-coincidence counts due to background Raman photons. (c) 2006 Optical Society of America
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页码：1905 / 1907
页数：3
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