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

被引：46

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.

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页码：127 / 135

页数：9

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