Measurement of Ultra-Low Frequency Vibrations Using an Atom Interferometer

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.