Rotation sensing with improved stability using point source atom
interferometry
- URL: http://arxiv.org/abs/2002.08369v2
- Date: Wed, 5 Aug 2020 05:35:57 GMT
- Title: Rotation sensing with improved stability using point source atom
interferometry
- Authors: Chen Avinadav, Dimitry Yankelev, Moshe Shuker, Nir Davidson, and Ofer
Firstenberg
- Abstract summary: Point source atom interferometry is a promising approach for implementing robust, high-sensitivity, rotation sensors using cold atoms.
We present two methods to stabilize the scale factor, one relying on a model-based correction which exploits correlations between multiple features of the interferometer output.
We demonstrate both schemes experimentally with complete suppression of scale factor drifts, maintaining the original rotation sensitivity and allowing for bias-free operation over several hours.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Point source atom interferometry is a promising approach for implementing
robust, high-sensitivity, rotation sensors using cold atoms. However, its scale
factor, i.e., the ratio between the interferometer signal and the actual
rotation rate, depends on the initial conditions of the atomic cloud, which may
drift in time and result in bias instability, particularly in compact devices
with short interrogation times. We present two methods to stabilize the scale
factor, one relying on a model-based correction which exploits correlations
between multiple features of the interferometer output and works on a
single-shot basis, and the other a self-calibrating method where a known bias
rotation is applied to every other measurement, requiring no prior knowledge of
the underlying model but reducing the sensor bandwidth by a factor of two. We
demonstrate both schemes experimentally with complete suppression of scale
factor drifts, maintaining the original rotation sensitivity and allowing for
bias-free operation over several hours.
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