使用交叉拼接双折射光纤生成偏振纠缠光子对。

Generating polarization-entangled photon pairs using cross-spliced birefringent fibers.

作者信息

Meyer-Scott Evan, Roy Vincent, Bourgoin Jean-Philippe, Higgins Brendon L, Shalm Lynden K, Jennewein Thomas

机构信息

Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada.

出版信息

Opt Express. 2013 Mar 11;21(5):6205-12. doi: 10.1364/OE.21.006205.

DOI:10.1364/OE.21.006205

PMID:23482189

Abstract

We demonstrate a novel polarization-entangled photon-pair source based on standard birefringent polarization-maintaining optical fiber. The source consists of two stretches of fiber spliced together with perpendicular polarization axes, and has the potential to be fully fiber-based, with all bulk optics replaced with in-fiber equivalents. By modelling the temporal walk-off in the fibers, we implement compensation necessary for the photon creation processes in the two stretches of fiber to be indistinguishable. Our source subsequently produces a high quality entangled state having (92.2 ± 0.2) % fidelity with a maximally entangled Bell state.

摘要

我们展示了一种基于标准双折射保偏光纤的新型偏振纠缠光子对源。该源由两段偏振轴相互垂直拼接在一起的光纤组成，并且有可能完全基于光纤，用光纤内的等效器件取代所有的块状光学元件。通过对光纤中的时间走离进行建模，我们实现了两段光纤中光子产生过程难以区分所需的补偿。我们的源随后产生了一个与最大纠缠贝尔态具有（92.2±0.2）%保真度的高质量纠缠态。