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Miniaturized inertial sensor based on high-resolution dual atom interferometry.

Si-Bin Lu1, Jia-Hao Fu1,2, Min Jiang1

  • 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
|January 23, 2025
PubMed
Summary
This summary is machine-generated.

A new miniaturized inertial sensor uses dual atom interferometry for high-resolution acceleration and rotation measurements. This compact sensor overcomes the size-sensitivity trade-off for advanced inertial navigation applications.

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Area of Science:

  • Physics
  • Quantum Sensing
  • Inertial Navigation

Background:

  • Atom interferometry offers high sensitivity for inertial measurements but faces challenges in field applications due to size constraints.
  • Existing sensors struggle with the trade-off between sensitivity and physical size, limiting their use in inertial navigation.

Purpose of the Study:

  • To develop a miniaturized inertial sensor capable of simultaneously measuring acceleration and rotation with high resolution.
  • To address the need for compact, high-performance sensors in inertial navigation systems.

Main Methods:

  • Utilized high-resolution dual atom interferometers integrated into a compact sensor head (100 L volume).
  • Fabricated vacuum chambers using bonded quartz-glass windows with epoxy resin.
  • Developed a temperature compensation method and employed wave vector reversal to mitigate phase drifts.

Main Results:

  • Achieved dual atom interference fringes with a contrast of 29%.
  • Demonstrated simultaneous measurement of acceleration and rotation by extracting phase shifts.
  • Obtained measurement resolutions of 40 ng for acceleration and 6.1 nrad/s for rotation.

Conclusions:

  • The developed miniaturized dual atom interferometer sensor successfully measures acceleration and rotation simultaneously with high resolution.
  • The sensor design and compensation methods overcome previous limitations, paving the way for advanced inertial navigation.