Stable single-photon interference in a 1 km fiber-optic Mach-Zehnder interferometer with continuous phase adjustment |
| |
Authors: | Xavier G B von der Weid J P |
| |
Institution: | Center for Telecommunication Studies, Pontifical Catholic University of Rio de Janeiro, R. Marquês de S?o Vicente 225, Gávea, 22451-900, Rio de Janeiro, Brazil. guix@opto.cetuc.puc?rio.br |
| |
Abstract: | 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. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|