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Related Experiment Video

Updated: Nov 12, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

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Optimised domain-engineered crystals for pure telecom photon sources.

Alexander Pickston, Francesco Graffitti, Peter Barrow

    Optics Express
    |March 17, 2021
    PubMed
    Summary
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    This study presents a novel telecom-wavelength photon source for quantum computing. It achieves high indistinguishability and heralding efficiency, crucial for building multi-qubit states with fewer errors.

    Area of Science:

    • Quantum optics
    • Quantum information science
    • Photonics

    Background:

    • High-efficiency, indistinguishable photon sources are essential for scalable quantum computing.
    • Existing sources often require lossy spectral filtering, limiting performance.
    • Domain engineering offers a path to integrated, high-performance photon sources.

    Purpose of the Study:

    • To develop a telecom-wavelength photon-pair source utilizing domain engineering.
    • To demonstrate high photon indistinguishability and heralding efficiency without spectral filtering.
    • To advance the creation of multi-qubit states for quantum information processing.

    Main Methods:

    • Utilized domain engineering in a parametric down-conversion source.
    • Generated photons at telecom wavelengths from independent sources.

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    Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
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    Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation

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    Related Experiment Videos

    Last Updated: Nov 12, 2025

    Generation and Coherent Control of Pulsed Quantum Frequency Combs
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    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

    9.4K
    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
    07:56

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

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    Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
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  • Measured two-photon interference visibility and heralding efficiency.

    • Main Results:

    • Achieved two-photon interference visibilities up to 98.6% ± 1.1% without filtering.
    • Reached net heralding efficiencies up to 67.5%.
    • Demonstrated collection efficiencies exceeding 90%.

    Conclusions:

    • Domain engineering enables efficient, indistinguishable photon generation at telecom wavelengths.
    • The developed source is suitable for building multi-qubit states with reduced errors.
    • This work represents a significant step towards practical quantum information technologies.