Stable single-photon interference in a 1 km fiber-optical Mach-Zehnder interferometer with continuous phase adjustment
| Autor: | Xavier, G. B., von der Weid, J. P. |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Opt. Lett. 36, 1764 (2011) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1364/OL.36.001764 |
| Popis: | We experimentally demonstrate stable and user-adjustable single-photon interference in a 1 km long fiber- optical 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 Comment: 3 pages, 3 figures |
| Databáze: | arXiv |
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