Stability comparison of two absolute gravimeters: optical versus atomic interferometers

Abstract

We report the direct comparison between the stabilities of two mobile absolute gravimeters of different technology: the LNE-SYRTE Cold Atom Gravimeter and FG5X#216 of the Université du Luxembourg. These instruments rely on two different principles of operation: atomic and optical interferometry. The comparison took place in the Walferdange Underground Laboratory for Geodynamics in Luxembourg, at the beginning of the last International Comparison of Absolute Gravimeters, ICAG-2013. We analyse a 2h10 duration common measurement, and find that the CAG shows better immunity with respect to changes in the level of vibration noise, as well as a slightly better short term stability.

Frequency-doubled telecom fiber laser for a cold atom interferometer using optical lattices

“…Cold atom interferometers [1] have demonstrated to be very accurate and sensitive sensors to measure gravity acceleration [2,3,4], gravity gradient [5,6] and rotation [7,8]. Now, more and more experiments are using optical lattices [9] to improve the performance of these sensors.…”

Absolute Gravity Measurements

“…The macroscopic test body or the clouds of the cold atoms (Peters et al, 2001;Gillot et al, 2014) are used as test objects in absolute gravimeters. The gravimeters with the cold atoms are called cold atom gravimeters.…”

Resolving Geophysical Signals by Terrestrial Gravimetry: A Time Domain Assessment of the Correction‐Induced Uncertainty

“…Many more applications of absolute and relative gravity measurements have been reviewed by Crossley et al () and Van Camp et al (). Given the ongoing technological advancements in terrestrial gravimetry toward smaller, more precise, and more affordable instruments, including the development of new technologies such as atom quantum instruments (Gillot et al, ; Ménoret et al, ) and microelectromechanical devices (Middlemiss et al, ), fields of research and application for terrestrial gravimetry can be expected to grow further in the future.…”