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Related Experiment Video

Updated: Mar 10, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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High quality entanglement on a chip-based frequency comb.

F Mazeas, M Traetta, M Bentivegna

    Optics Express
    |December 14, 2016
    PubMed
    Summary
    This summary is machine-generated.

    We developed an efficient silicon photonics source for energy-time entangled photon pairs. This compact device offers high spectral brightness and purity, paving the way for advanced quantum communication systems.

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    Area of Science:

    • Quantum optics
    • Integrated photonics
    • Quantum information science

    Background:

    • Efficient generation of entangled photon pairs is crucial for quantum communication and computation.
    • Silicon photonics offers a scalable platform for integrated quantum optical devices.
    • Four-wave mixing in resonators is a promising nonlinear process for photon-pair generation.

    Purpose of the Study:

    • To report an efficient energy-time entangled photon-pair source using a silicon photonics ring resonator.
    • To characterize the spectral brightness and entanglement purity of the generated photon pairs.
    • To assess the compatibility of the source with existing telecommunication infrastructure.

    Main Methods:

    • Utilizing four-wave mixing in a CMOS-compatible silicon photonics ring resonator.
    • Optimizing the resonator design and pump power for efficient entangled photon-pair generation.
    • Measuring spectral brightness and raw entanglement visibility using standard telecom components.

    Main Results:

    • Achieved a spectral brightness of 400 entangled photon pairs/s/MHz at 500 μW pump power.
    • Demonstrated high-purity energy-time entanglement with raw visibilities exceeding 98% in the telecom C-band.
    • Confirmed compatibility with dense wavelength division multiplexers for integration into telecom systems.

    Conclusions:

    • The developed silicon photonics source is highly efficient and compact for generating energy-time entangled photons.
    • The source's performance metrics are suitable for practical quantum communication applications.
    • This work represents a significant step towards complex integrated quantum photonic circuits for quantum networks.