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Measurement of Ultra-Low Frequency Vibrations Using an Atom Interferometer.

Zenghan Ma1,2, Wei Zhuang2,3, Yang Zhao2,3

  • 1College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130026, China.

Sensors (Basel, Switzerland)
|July 12, 2025
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Summary
This summary is machine-generated.

This study introduces a novel atom interferometer method for ultra-low-frequency vibration measurement, achieving high precision from 0.01 Hz to DC. The technique offers significant advancements for structural mechanics and aerospace applications.

Keywords:
atom interferometerlow-frequency vibration measurementvibration isolation

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Area of Science:

  • Physics
  • Metrology
  • Engineering

Background:

  • Accurate measurement of low-frequency and ultra-low-frequency vibrations is crucial across various scientific and industrial fields.
  • Current measurement techniques struggle to achieve both high precision and ultra-low-frequency detection capabilities.

Purpose of the Study:

  • To develop and demonstrate a novel method for ultra-low-frequency vibration measurement using atom interferometry.
  • To extend the measurement range down to 0.01 Hz and direct current (DC).

Main Methods:

  • Utilized an atom interferometer for vibration signal detection.
  • Experimentally validated performance for vibrations in the 0.007 Hz to 0.01 Hz range.
  • Investigated the impact of active vibration isolation on measurement sensitivity.

Main Results:

  • Achieved a sensitivity of 1.1 μm/s2/√Hz for ultra-low-frequency vibrations.
  • Demonstrated capability to measure signals from 0.01 Hz to DC.
  • Showcased potential for enhanced sensitivity to 0.2 μm/s2/√Hz with active vibration isolation.

Conclusions:

  • The atom interferometer-based method provides a breakthrough for ultra-low-frequency vibration measurement.
  • This technique significantly improves precision and extends the measurable frequency range compared to existing methods.
  • Further enhancements with active vibration isolation promise even greater measurement capabilities.