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

被引：96

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

引用

页码：1905 / 1907

页数：3

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