Stable single-photon interference in a 1 km fiber-optic Mach-Zehnder interferometer with continuous phase adjustment

被引：45

作者：

Xavier, G. B. ^{[1
]}

von der Weid, J. P. ^{[1
]}

机构：

[1] Pontifical Catholic Univ Rio de Janeiro, Ctr Telecommun Studies, BR-22451900 Rio De Janeiro, Brazil

来源：

OPTICS LETTERS | 2011年 / 36卷 / 10期

关键词：

D O I：

10.1364/OL.36.001764

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We experimentally demonstrate stable and user-adjustable single-photon interference in a 1 km long fiber-optic Mach-Zehnder interferometer, using an active phase control system with the feedback provided by a classical laser. We are able to continuously tune the single-photon phase difference between the interferometer arms using a phase modulator, which is synchronized with the gate window of the single-photon detectors. The phase control system employs a piezoelectric fiber stretcher to stabilize the phase drift in the interferometer. A single-photon net visibility of 0.97 is obtained, yielding future possibilities for experimental realizations of quantum repeaters in optical fibers and violation of Bell's inequalities using genuine energy-time entanglement. (C) 2011 Optical Society of America

引用

页码：1764 / 1766

页数：3