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Updated: Jun 25, 2025

Implementation of a Reference Interferometer for Nanodetection
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Self-calibrated atom-interferometer gyroscope by modulating atomic velocities.

Hong-Hui Chen1,2, Zhan-Wei Yao1,3, Ze-Xi Lu1,2

  • 1State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China.

The Review of Scientific Instruments
|May 23, 2024
PubMed
Summary
This summary is machine-generated.

This study presents a self-calibration method for atom-interferometer gyroscopes, crucial for precise rotation measurements. The technique uses laser frequency detuning to modulate the scale factor, enabling absolute rotation determination with 162 ppm uncertainty.

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Area of Science:

  • Quantum physics
  • Metrology
  • Inertial navigation

Background:

  • Atom-interferometer gyroscopes offer exceptional long-term stability and low drift.
  • High-precision instruments require self-calibration for absolute rotation measurement.
  • Existing methods face challenges in eliminating ambiguity in interferometric signals.

Purpose of the Study:

  • To propose and demonstrate a novel self-calibration technique for atom-interferometer gyroscopes.
  • To achieve absolute rotation measurement by eliminating interferometric signal ambiguity.
  • To validate the self-calibration method through measurement of Earth's rotation.

Main Methods:

  • Utilizing laser frequency detuning to control atomic velocity.
  • Modulating the gyroscope's scale factor via controlled atomic velocity.
  • Leveraging interference stripe order and initial phase determination for calibration.

Main Results:

  • Successful demonstration of self-calibration for an atom-interferometer gyroscope.
  • Measurement of Earth's rotation rate with a relative uncertainty of 162 ppm.
  • Elimination of ambiguity caused by the periodicity of the interferometric signal.

Conclusions:

  • The proposed self-calibration method enables absolute rotation measurement in atom-interferometer gyroscopes.
  • This technique is vital for enhancing the precision and reliability of inertial navigation systems.
  • Applications span fundamental physics, geophysics, and long-term navigation requiring stable, self-calibrated gyroscopes.