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A self-referenced optical phase noise analyzer for quantum technologies.

R Freund1, Ch D Marciniak1, T Monz1

  • 1Universität Innsbruck, Institut für Experimentalphysik, Innsbruck, Austria.

The Review of Scientific Instruments
|June 20, 2024
PubMed
Summary
This summary is machine-generated.

We developed a low-cost optical phase noise analyzer for quantum technologies. This tool accurately measures phase noise, offering a cost-effective alternative to expensive commercial options for characterizing quantum systems.

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Area of Science:

  • Quantum Technology
  • Optical Metrology

Background:

  • Quantum technologies require precise control over noise to achieve quantum advantage.
  • Characterizing noise, specifically phase noise power spectral density, is crucial but often technically demanding and expensive for leading quantum platforms.

Purpose of the Study:

  • To present and characterize a low-complexity, low-cost optical phase noise analyzer.
  • To enable accessible phase noise measurements for quantum technology applications.

Main Methods:

  • Utilized short-delay optical self-heterodyne measurements.
  • Implemented an all-stock-component design for the optical phase noise analyzer.
  • Compared two ultra-stable oscillators with ≈1 Hz linewidth near 729 nm.

Main Results:

  • Achieved a noise floor comparable to commercial offerings.
  • Demonstrated the apparatus's capability to measure phase noise power spectra.
  • Identified limitations and tradeoffs of the implemented measurement apparatus.

Conclusions:

  • The developed optical phase noise analyzer provides a cost-effective and accessible solution for quantum technology development.
  • This setup can serve as a valuable sensor for component manufacturers, even without a highly stable reference or operational quantum system.