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Robust squeezed light against mode mismatch using a self imaging optical parametric oscillator.

Chan Roh1, Geunhee Gwak1, Young-Sik Ra2

  • 1Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Korea.

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|September 24, 2021
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Summary
This summary is machine-generated.

We developed robust squeezed light using a novel optical parametric oscillator. This light is highly resistant to spatial imperfections, outperforming standard squeezed light even under significant misalignment.

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Area of Science:

  • Quantum optics
  • Nonlinear optics

Background:

  • Squeezed light is crucial for quantum technologies but sensitive to spatial mode mismatch.
  • Existing methods for generating robust squeezed light are often complex or limited.

Purpose of the Study:

  • To generate and characterize squeezed light robust against spatial mode mismatches.
  • To investigate the performance of this novel squeezed light under detuned conditions.

Main Methods:

  • Generation of squeezed light from a below-threshold self-imaging optical parametric oscillator.
  • Characterization of quantum properties under varying degrees of beam displacement, tilt, and size difference.
  • Comparison with single-mode squeezed light.

Main Results:

  • Successfully generated squeezed light robust against spatial mode mismatch.
  • Observed superior robustness compared to single-mode squeezed light, even outperforming infinitely squeezed light at higher mismatch levels.
  • Demonstrated resilience even when the oscillator deviates from ideal self-imaging conditions.

Conclusions:

  • The developed self-imaging optical parametric oscillator provides a practical source of highly robust squeezed light.
  • This technology offers significant advantages for quantum applications sensitive to optical alignment.
  • Potential for improved performance in quantum sensing and information processing.