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  • 1.
    Sauge, Sebastien
    et al.
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Swillo, Marcin
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Albert-Seifried, Sebastian
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Waldebäck, Johan
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Tengner, Maria
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Ljunggren, Daniel
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Karlsson, Anders
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Xavier, G. B.
    Narrowband polarization-entangled photon pairs distributed over a WDM link for qubit networks2007In: CLEO/Europe IQEC 2007: 17-22 June 2007, Munich, Germany, 2007, p. 4387014-Conference paper (Refereed)
  • 2.
    Sauge, Sebastien
    et al.
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Swillo, Marcin
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Albert-Seifried, Sebastian
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Xavier, Guilherme
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Waldebäck, Johan
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Tengner, Maria
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Ljunggren, Daniel
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Karlsson, Anders
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Narrowband polarization-entangled photon pairs distributed over a WDM link for qubit networks2007In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 15, no 11, p. 6926-6933Article in journal (Refereed)
    Abstract [en]

    We present a bright, narrowband, portable, quasi-phase- matched two-crystal source generating polarization- entangled photon pairs at 809 nm and 1555 nm at a maximum rate of 1.2 x 10(6) s(-1) THz(-1) mW(-1) after coupling to single- mode fiber. The quantum channel at 1555 nm and the synchronization signal gating the single photon detector are multiplexed in the same optical fiber of length 27 km by means of wavelength division multiplexers (WDM) having 100 GHz (0.8 nm) spacing between channels. This implementation makes quantum communication applications compatible with current high-speed optical networks.

  • 3.
    Sauge, Sebastien
    et al.
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Swillo, Marcin
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Albert-Seifried, Sebastian
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Xavier, Guilherme
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Waldebäck, Johan
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Tengner, Maria
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Ljunggren, Daniel
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Wang, Qin
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Karlsson, Anders
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Quantum communication in optical networks: an overview and selected recent results2007In: ICTON 2007: Proceedings of the 9th International Conference on Transparent Optical Networks, Vol 1 / [ed] Marciniak, M, 2007, p. 30-33Conference paper (Refereed)
    Abstract [en]

    We discuss recent work in quantum communication, and in some details present a bright, narrowband, portable, quasi-phase-matched two-crystal source generating polarization-entangled photon pairs at 809 nm and 1555 nm. We also show how the single-photon quantum channel at 1555 nm and a classical synchronization signal gating the single photon detector at the receiving side can be multiplexed in the same optical fiber of length 27 km by means of wavelength division multiplexers (WDM) having 100 GHz (0.8 nm) spacing between channels. This illustrates bow single-photon quantum communication applications is compatible with current high-speed optical networks.

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