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Evaluation of a frequency-dependent phase shift in chirped Raman lasers for atom gravimeters

Journal Article · · Physical Review A
Light-pulse atom gravimetry has emerged as a powerful technique for precisely measuring absolute gravitational acceleration. Raman lasers are commonly used in this technique to coherently manipulate the atomic wave packet, of which the effective frequency is chirped continuously to compensate for the Doppler shift. In this study we investigate an additional phase shift in the Raman lasers that arises due to the frequency chirp. Here, we directly measure this phase shift by recording the beat signal of the Raman lasers with a high-speed oscilloscope, providing an independent evaluation of the resultant error in atom gravimeters caused by this phase shift. Concurrently, we detect the influence of the additional phase shift on gravity measurements using our atom gravimeter, and the results are in good agreement with the independent evaluation. Notably, there may still be a residual error at the microgal level when performing differential measurements by reversing the direction of the effective wave vector of the Raman lasers. We propose that this residual error can in principle be eliminated by selecting the same chirp frequency range for both directions in the differential measurement.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
3002001
Journal Information:
Physical Review A, Journal Name: Physical Review A Journal Issue: 6 Vol. 110; ISSN 2469-9934; ISSN 2469-9926
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (47)

Absolute airborne gravimetry with a cold atom sensor journal January 2020
Calibration of a superconducting gravimeter with an absolute atom gravimeter journal May 2021
The results of 10th International Comparison of Absolute Gravimeters (ICAG-2017) journal May 2021
The effect of wavefront aberrations in atom interferometry journal June 2015
Marine gravimetry using the strapdown gravimeter SGA-WZ journal June 2017
Measurement of gravitational acceleration by dropping atoms journal August 1999
Detecting inertial effects with airborne matter-wave interferometry journal September 2011
Absolute marine gravimetry with matter-wave interferometry journal February 2018
Gravity measurements below 10−9 g with a transportable absolute quantum gravimeter journal August 2018
Note: Directly measuring the direct digital synthesizer frequency chirp-rate for an atom interferometer journal September 2015
Note: Effect of the parasitic forced vibration in an atom gravimeter journal June 2018
Measuring the effective height for atom gravimeters by applying a frequency jump to Raman lasers journal June 2021
A car-based portable atom gravimeter and its application in field gravity survey journal November 2021
Influence of magnetic field on the seismometer in vibration correction for atom gravimeters journal April 2022
High-precision gravity measurements using atom interferometry journal February 2001
Testing the Universality of Free Fall by Comparing the Atoms in Different Hyperfine States with Bragg Diffraction* journal April 2020
The influence of transverse motion within an atomic gravimeter journal June 2011
Improving the accuracy of atom interferometers with ultracold sources journal November 2018
Shift evaluation of the atomic gravimeter NIM-AGRb-1 and its comparison with FG5X journal April 2018
A new type of compact gravimeter for long-term absolute gravity monitoring journal February 2019
Accuracy and stability evaluation of the 85Rb atom gravimeter WAG-H5-1 at the 2017 International Comparison of Absolute Gravimeters journal July 2019
Evaluation of the transportable atom gravimeter HUST-QG journal August 2022
Mobile quantum gravity sensor with unprecedented stability journal June 2016
Impact of direct-digital-synthesizer finite resolution on atom gravimeters journal April 2020
Continuous gravity measurement with a portable atom gravimeter journal September 2023
Off-resonant Raman transition impact in an atom interferometer journal October 2008
Phase shift in an atom interferometer induced by the additional laser lines of a Raman laser generated by modulation journal September 2012
Demonstration of an ultrahigh-sensitivity atom-interferometry absolute gravimeter journal October 2013
Influence of chirping the Raman lasers in an atom gravimeter: Phase shifts due to the Raman light shift and to the finite speed of light journal December 2015
Observing the effect of wave-front aberrations in an atom interferometer by modulating the diameter of Raman beams journal April 2016
Effect of the Gaussian distribution of both atomic cloud and laser intensity in an atom gravimeter journal May 2016
Bragg interferometer for gravity gradient measurements journal June 2016
On-site calibration of the Raman laser absolute frequency for atom gravimeters journal June 2018
Ultrahigh-Sensitivity Bragg Atom Gravimeter and its Application in Testing Lorentz Violation journal July 2023
Atom-Interferometry Tests of the Isotropy of Post-Newtonian Gravity journal January 2008
Atom Interferometry with up to 24-Photon-Momentum-Transfer Beam Splitters journal May 2008
Influence of the Coriolis Force in Atom Interferometry journal February 2012
Test of the Universality of Free Fall with Atoms in Different Spin Orientations journal July 2016
Canceling the Gravity Gradient Phase Shift in Atom Interferometry journal December 2017
Effective Inertial Frame in an Atom Interferometric Test of the Equivalence Principle journal May 2018
Atomic interferometry using stimulated Raman transitions journal July 1991
Gravity surveys using a mobile atom interferometer journal September 2019
Realization of a compact one-seed laser system for atom interferometer-based gravimeters journal January 2018
Investigating the frequency-dependent amplification of a tapered amplifier in atom interferometers journal December 2014
Eliminating the phase shifts arising from additional sidebands in an atom gravimeter with a phase-modulated Raman laser journal December 2021
Impact of additional sidebands generated by a tapered amplifier on an atom interferometer journal September 2022
A Truck-Borne System Based on Cold Atom Gravimeter for Measuring the Absolute Gravity in the Field journal August 2022

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