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Single telecom photon heralding by wavelength multiplexing in an optical fiber

Applied Physics B volume 122, Article number: 20 (2016) Cite this article

Abstract

We demonstrate the multiplexing of a weak coherent and a quantum state of light in a single telecommunication fiber. For this purpose, we make use of spontaneous parametric down conversion and quantum frequency conversion to generate photon pairs at 854 nm and the telecom O-band. The herald photon at 854 nm triggers a telecom C-band laser pulse. The telecom single photon (O-band) and the laser pulse (C-band) are combined and coupled to a standard telecom fiber. Low-background time correlation between the weak coherent and quantum signal behind the fiber shows successful multiplexing.

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Acknowledgments

The work was funded by the German Federal Ministry of Science and Education (BMBF) within the projects “Q.com-Q” (Contract No. 16KIS0127). J. Brito acknowledges support by CONICYT.

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Authors and Affiliations

  1. Quantenoptik, Fachrichtung 7.2, Universität des Saarlandes, Campus E2.6, 66123, Saarbrücken, Germany

    Andreas Lenhard, Matthias Bock & Christoph Becher

  2. Quantenphotonik, Fachrichtung 7.2, Universität des Saarlandes, Campus E2.6, 66123, Saarbrücken, Germany

    José Brito, Stephan Kucera & Jürgen Eschner

Authors
  1. Andreas Lenhard
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  2. José Brito
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  3. Stephan Kucera
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  4. Matthias Bock
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  5. Jürgen Eschner
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  6. Christoph Becher
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Corresponding author

Correspondence to Christoph Becher.

Additional information

This paper is part of the topical collection “Quantum Repeaters: From Components to Strategies” guest edited by Manfred Bayer, Christoph Becher and Peter van Loock.

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Lenhard, A., Brito, J., Kucera, S. et al. Single telecom photon heralding by wavelength multiplexing in an optical fiber. Appl. Phys. B 122, 20 (2016). https://doi.org/10.1007/s00340-015-6284-9

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  • DOI: https://doi.org/10.1007/s00340-015-6284-9

Keywords

  • Laser Pulse
  • Fiber Bragg Grating
  • Quantum Channel
  • Wavelength Division Multiplexer
  • Lithium Niobate