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Related Experiment Video

Updated: Jun 14, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Accessing higher order correlations in quantum optical states by time multiplexing.

M Avenhaus¹, K Laiho, M V Chekhova

¹Max Planck Institute for the Science of Light, Günther-Scharowsky-Strasse 1/Bau 24, 91058 Erlangen, Germany. malte.avenhaus@mpl.mpg.de

Physical Review Letters

|April 7, 2010

Summary

Researchers measured higher-order normalized correlation functions of pulsed light using a novel time-multiplexing detector. The device accurately characterized coherent and pseudothermal light, confirming its potential for quantum optics research.

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Area of Science:

Quantum Optics
Photon Statistics
Quantum Measurement

Background:

Higher-order correlations reveal detailed photon statistics.
Characterizing nonclassical light sources is crucial for quantum technologies.
Existing methods for measuring high-order correlations can be complex.

Purpose of the Study:

To experimentally measure higher-order normalized correlation functions (NCF) of pulsed light.
To demonstrate the performance of a novel time-multiplexing detector for NCF measurements.
To apply the technique to characterize a type-II parametric down-conversion source.

Main Methods:

Utilized a time-multiplexing detector for measuring NCF.
Verified device performance with coherent and pseudothermal light sources.
Applied the measurement technique to a type-II spontaneous parametric down-conversion (SPDC) source.

Main Results:

Achieved unity-valued NCF up to the eighth order for coherent light.
Observed factorial dependence of NCF for pseudothermal light.
Investigated mutual two-mode correlations from the SPDC source, confirming nonclassicality.

Conclusions:

The developed time-multiplexing detector offers excellent performance for high-order NCF measurements.
The technique successfully characterizes photon statistics of various light sources.
This method provides a valuable tool for investigating quantum correlations and nonclassicality.