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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Note: Scalable multiphoton coincidence-counting electronics.

D Branning1, S Khanal, Y H Shin

  • 1Department of Physics, Trinity College, Hartford, Connecticut 06106, USA.

The Review of Scientific Instruments
|February 2, 2011
PubMed
Summary
This summary is machine-generated.

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We developed a versatile multichannel coincidence-counting module for quantum optics. This compact, low-cost device precisely measures coincidences, enabling advanced quantum experiments with high input rates.

Area of Science:

  • Quantum Optics
  • Experimental Physics
  • Photonics

Background:

  • Quantum optics experiments often require precise timing measurements of photon detection events.
  • Existing coincidence counting methods can be complex, expensive, or limited in scalability.
  • Accurate multichannel coincidence detection is crucial for advanced quantum information processing and fundamental physics studies.

Purpose of the Study:

  • To introduce a novel, cost-effective multichannel coincidence-counting module.
  • To provide a flexible and scalable solution for detecting twofold, threefold, and fourfold coincidences.
  • To enable high-rate data acquisition in quantum optics experiments.

Main Methods:

  • The module accepts up to four transistor-transistor logic pulse inputs.

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Last Updated: Jun 4, 2026

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  • It counts coincidences within a user-selectable time window, as short as 12 nanoseconds.
  • The system is designed for high input rates, up to 84 megahertz.

    • Main Results:

    • The module accurately counts eight sets of multichannel coincidences.
    • It demonstrates precise twofold, threefold, and fourfold coincidence detection.
    • The design facilitates the combination of multiple modules for higher-order coincidence counting.

    Conclusions:

    • The developed module offers a compact, low-cost, and scalable solution for coincidence counting in quantum optics.
    • Its flexibility and high performance make it suitable for a wide range of quantum experiments.
    • This technology can be readily integrated to achieve arbitrary M-order coincidences among N inputs.