Efficient generation of polarization-entangled photons in a nonlinear crystal

被引：73

作者：

Wong, F. N. C. ^{[1
]}

Shapiro, J. H. ^{[1
]}

Kim, T. ^{[1
]}

机构：

[1] MIT, Elect Res Lab, Cambridge, MA 02139 USA

来源：

LASER PHYSICS | 2006年 / 16卷 / 11期

关键词：

D O I：

10.1134/S1054660X06110053

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We review the use of bidirectional pumping and collinear propagation in type-II phase-matched periodically poled KTiOPO4 to achieve efficient generation of polarization-entangled photons via spontaneous parametric downconversion. The advantages of this approach are fully exploited in our optimized polarization Sagnac interferometric source. Its measured flux of 4700 polarization-entangled photon pairs/s per milliwatt of pump power in a 1-nm bandwidth exhibited 99% quantum-interference visibility. We also present a plane-wave Gaussian state theory for continuous-wave spontaneous parametric downconversion. This formulation affords the complete description of multiple-pair emissions that is needed for quantum communication analyses while reducing to the usual biphoton-state description at low generation rates.

引用

页码：1517 / 1524

页数：8

共 30 条

[1] INTERACTIONS BETWEEN LIGHT WAVES IN A NONLINEAR DIELECTRIC [J].