Cavity Atom Interferometer For Noise-Suppressed Inertial Sensing

Tech ID: 30047 / UC Case 2019-075-0

Patent Status

Patent Pending

Brief Description

The sensitivity of mobile atom interferometers for gravimetry, gradiometry and inertial sensing has been limited by a noise floor due to ground vibrations, as well as available free-fall space. 


UC Berkeley researchers have developed an interferometer geometry that addresses both problems within an optical cavity. The utility of such a device lies primarily in its application as a mobile sensor, particularly for situations in the absence of a GPS signal (such as in deep-sea submarines, or in the event of a GPS system failure).  Similarly, sensing using gravitational signals has wide applicability. The configuration of this device accumulates an acceleration phase sensitive to low-frequency accelerations (i.e., gravity) while demonstrating an immunity to accelerations at higher frequencies than the held times (i.e., vibrations).

Suggested uses

  • mobile sensor 
  • inertial navigation devices



  • resolve phase-stable measurements with a greatly simplified vibration isolation system than is traditionally required for comparable inertial sensitivity
  • the effects of vibrations can be suppressed by a factor of about 100
  • the vertical free-fall distance required for a measurement of equivalent sensitivity is reduced by two to three orders of magnitude, from tens of centimeters to fractions of a millimeter


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  • Mu¨ller, Holger

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