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Related Experiment Videos

Measuring the absolute photodetection efficiency using photon number correlations.

Michael Lindenthal1, Johannes Kofler

  • 1Institut für Experimentalphysik, Universität Wien, 1090 Wien, Austria. michael.lindenthal@quantum.at

Applied Optics
|August 8, 2006
PubMed
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We developed two new methods to measure photon-counting detector efficiency using nonclassical light. These techniques do not require high time resolution, making them suitable for a wider range of photodetectors.

Area of Science:

  • Quantum Optics
  • Photon Detection

Background:

  • Accurate measurement of detector efficiency is crucial for quantum optics experiments.
  • Traditional methods often require high detector time resolution, limiting their applicability.

Purpose of the Study:

  • To present two novel methods for determining the absolute detection efficiency of photon-counting detectors.
  • To enable efficiency measurements for detectors with low time resolution.

Main Methods:

  • A continuous variable analog to coincidence counting using nonclassical light.
  • Difference detection, a standard technique in continuous variable quantum optics.

Main Results:

  • Both methods determine absolute detection efficiency directly from singles rates.

Related Experiment Videos

  • Neither method requires coincidence detection or high detector time resolution.

    • Conclusions:

    • These methods offer a practical solution for characterizing photodetectors with limited time resolution.
    • The techniques enhance the accessibility of quantum optics experiments by simplifying detector calibration.