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Single-Element Dual-Interferometer for Precision Inertial Sensing.

Yichao Yang1,2,3, Kohei Yamamoto1, Victor Huarcaya1

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Sensors (Basel, Switzerland)
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Summary
This summary is machine-generated.

We developed a compact, self-referenced single-element dual-interferometer (SEDI) inertial sensor for high-precision gravitational physics. This novel design achieves sub-picometer precision, enabling advanced space and ground-based experiments.

Keywords:
inertial sensinglaser interferometryoptical readout

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Area of Science:

  • Gravitational physics
  • Precision measurement
  • Optical sensing

Background:

  • High-precision tracking of moving masses is crucial for gravitational physics experiments.
  • Laser interferometry is a key technology, but multi-channel setups are complex.
  • Sinusoidal phase modulation homodyne interferometry simplifies optical setups but shifts complexity to signal processing.

Purpose of the Study:

  • To present a novel sensor topology for simplified, high-precision inertial sensing.
  • To introduce the self-referenced single-element dual-interferometer (SEDI) inertial sensor.
  • To demonstrate the feasibility of sub-picometer precision in a compact package.

Main Methods:

  • Deep frequency modulation interferometry.
  • Design of a self-referenced single-element dual-interferometer (SEDI) sensor.
  • Utilizing computer models and analytical methods for performance evaluation.

Main Results:

  • Demonstrated feasibility of sub-picometer precision for frequencies above 10 mHz in a compact SEDI sensor.
  • Showed that combining two SEDI devices can achieve sub-picometer precision down to 2 mHz.
  • The SEDI sensor offers significant size and weight advantages over conventional techniques.

Conclusions:

  • The SEDI sensor represents a promising advancement in high-precision inertial sensing.
  • Its compactness and precision make it suitable for next-generation space-based gravity missions and ground-based experiments.
  • SEDI technology facilitates drag-free control and advanced inertial isolation systems with optical readout.