Spatial and spectral mode selection of heralded single photons from pulsed parametric down-donversion

被引：26

作者：

Castelletto, S ^{[1
]}

Degiovanni, IP

Schettini, V

机构：

[1] IEN, Photometry Dept, I-10135 Turin, Italy

[2] NIST, Opt Technol Div, Gaithersburg, MD 20899 USA

来源：

OPTICS EXPRESS | 2005年 / 13卷 / 18期

关键词：

D O I：

10.1364/OPEX.13.006709

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We describe an experiment in which photon pairs from a pulsed parametric down-conversion ( PDC) source were coupled into single- mode fibers with heralding efficiencies as high as 70%. Heralding efficiency or mode preparation efficiency is defined as the probability of finding a photon in a fiber in a definite state, given the detection of its twin. Heralding efficiencies were obtained for a range of down- conversion beam-size configurations. Analysis of spatial and spectral mode selection, and their mutual correlation, provides a practical guide for engineering PDC-produced single photons in a definite mode and spectral emission band. The spectrum of the heralded photons were measured for each beam configuration, to determine the interplay between transverse momentum and spectral entanglement on the preparation efficiency.

引用

页码：6709 / 6722

页数：14