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Related Experiment Videos

Fiber-assisted detection with photon number resolution.

Daryl Achilles1, Christine Silberhorn, Cezary Sliwa

  • 1Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK. daryl.achilles@physics.ox.ac.uk

Optics Letters
|December 19, 2003
PubMed
Summary

We developed a photon-number-resolving detector using fiber optics and avalanche photodiodes. This device accurately infers photon numbers from weak coherent light, advancing quantum optics measurements.

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Area of Science:

  • Quantum Optics
  • Photonics
  • Experimental Physics

Background:

  • Accurate photon number detection is crucial for quantum information processing and fundamental physics experiments.
  • Existing methods for photon number resolution can be complex or limited in efficiency.
  • Developing practical and scalable photon number resolving detectors is an ongoing challenge.

Purpose of the Study:

  • To develop and demonstrate a novel photon-number-resolving detector.
  • To utilize a fiber-optical setup with standard avalanche photodiodes for photon detection.
  • To validate the detector's capability in resolving individual photon numbers from weak coherent states.

Main Methods:

  • The detector employs a fiber-optical beam splitter to divide a single-mode input state into eight output modes.

Related Experiment Videos

  • Standard avalanche photodiodes are used as single-photon detectors at each output port.
  • Photon statistics of weak coherent input light are reconstructed from experimental detection event data.

    • Main Results:

    • The developed detector successfully resolves individual photon numbers.
    • Experimental data allowed for the reconstruction of photon statistics.
    • A high probability of inferring the input photon number from a single measurement run was demonstrated.

    Conclusions:

    • The fiber-optical setup with avalanche photodiodes provides a practical approach to photon-number resolution.
    • The detector shows promise for applications requiring precise photon counting.
    • This work contributes to the advancement of quantum measurement technologies.