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Updated: Jun 24, 2026
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Absolute efficiency estimation of photon-number-resolving detectors using twin beams
A P Worsley1, H B Coldenstrodt-Ronge, J S Lundeen
1University of Oxford, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, United Kingdom.
Optics Express
|March 19, 2009
Summary
This study demonstrates a robust method for calibrating photon-number-resolving detectors using nonclassical light. The generalized Klyshko method enhances accuracy and allows for brighter light sources in quantum optics experiments.
Area of Science:
- Quantum Optics
- Metrology
- Photonics
Background:
- Accurate calibration of photon detectors is crucial for quantum information science.
- Existing methods, like Klyshko's, are limited in dynamic range and source compatibility.
Purpose of the Study:
- To generalize the Klyshko calibration method for photon-number-resolving detectors.
- To demonstrate an experimentally robust absolute efficiency calibration technique.
Main Methods:
- Utilized a nonclassical light source (entangled photon pairs).
- Extended the Klyshko calibration method to photon-number-resolving detectors.
- Employed brighter, amplified pulse-pumped twin-beam sources.
Main Results:
- Achieved absolute efficiency calibration of a photon-number-resolving detector.
- Demonstrated increased signal strength and measurement redundancy.
- Showcased a more robust calibration process.
Conclusions:
- The generalized Klyshko method offers a superior calibration for photon-number-resolving detectors.
- This technique enhances the reliability and applicability of quantum optical measurements.
- Enables the use of advanced light sources for improved detector characterization.
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