Source of polarization entanglement in a single periodically poled KTiOPO4 crystal with overlapping emission cones

被引：44
|
作者：
Fiorentino, M [1 ]
Kuklewicz, CE [1 ]
Wong, FNC [1 ]
机构：
[1] MIT, Elect Res Lab, Cambridge, MA 02139 USA
来源：
OPTICS EXPRESS | 2005年 / 13卷 / 01期
关键词：
D O I：
10.1364/OPEX.13.000127
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a simple polarization entanglemenet source based on type-II phase-matched parametric down-conversion in periodically poled KTiOPO4. By use of noncritical phase matching in a noncollinear geometry the single-crystal source emits a cone of polarization-entangled photons. Two beams on opposite sides of the cone are selected for measurements to yield an observed flux of 820 pairs/s per mW of pump power with a two-photon fringe visibility of 96%. With this source we measure a violation of Bell's inequality of 140 standard deviations in 160 s. (C) 2005 Optical Society of America.
引用
收藏
页码：127 / 135
页数：9
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