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High-performance guided-wave asynchronous heralded single-photon source.

O Alibart1, D B Ostrowsky, P Baldi

  • 1Laboratoire de Physique de la Matière Condensée, Unité Mixte de Recherche 6622, Centre National de la Recherche Scientifique, Université de Nice-Sophia Antipolis, Parc Valrose 06108, Nice 2, France. olivier.alibart@unice.fr

Optics Letters
|July 13, 2005
PubMed
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We developed a new single-photon source for quantum networks. This heralded single-photon source achieves high detection probability and low multiphoton emission, crucial for quantum communication.

Area of Science:

  • Quantum optics
  • Photonics
  • Quantum information science

Background:

  • Single-photon sources are essential for quantum technologies.
  • Spontaneous parametric down-conversion (SPDC) is a common method for photon pair generation.
  • Guided-wave sources offer advantages in integration and stability.

Purpose of the Study:

  • To demonstrate a guided-wave asynchronous heralded single-photon source.
  • To achieve high heralded single-photon detection probability.
  • To reduce multiphoton emission probability for improved quantum signal fidelity.

Main Methods:

  • Utilizing spontaneous parametric down-conversion (SPDC) in a periodically poled lithium niobate (PPLN) waveguide.
  • Generating nondegenerate photon pairs at 1310 nm (signal) and 1550 nm (idler).

Related Experiment Videos

  • Employing the signal photon as a trigger for a gated detection process of the idler photon.

    • Main Results:

    • Achieved a heralded single-photon detection probability of 0.37 at 1550 nm.
    • Reduced multiphoton emission probability by a factor of 10 compared to Poissonian sources.
    • Validated a developed model for calculating source performance metrics.

    Conclusions:

    • The demonstrated guided-wave source is a promising candidate for quantum communication and computation networks.
    • The high detection efficiency and low noise pave the way for practical quantum network implementation.
    • The study provides a framework for designing future quantum network components.