Calibration of atomic trajectories in a large-area dual-atom-interferometer gyroscope

Yao, Zhan-Wei; Lu, Si-Bin; Li, Runbing; Luo, Jun; Wang, Jin; Zhan, Min

doi:10.1103/physreva.97.013620

Cited by 26 publications

(23 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This bias has to be compared to a signal of about 16 rad for the Earth rotation rate (72 µrad.s −1 ) in an interferometer with T = 50 ms and v 3 m.s −1 . The long term stability is thus constrained to a level of the order of 7×10 −8 rad.s −1 , consistent with the value reported in several articles 125,131,132 . c. Second generation of cold-atom gyroscopes.…”

Section: Instruments Targeting High Stability Levels With Long Interrogation Timessupporting

confidence: 87%

High-accuracy inertial measurements with cold-atom sensors

Geiger

Landragin

Merlet

et al. 2020

AVS Quantum Science

152

View full text Add to dashboard Cite

The research on cold-atom interferometers gathers a large community of about 50 groups worldwide both in the academic and now in the industrial sectors. The interest in this sub-field of quantum sensing and metrology lies in the large panel of possible applications of cold-atom sensors for measuring inertial and gravitational signals with a high level of stability and accuracy. This review presents the evolution of the field over the last 30 years and focuses on the acceleration of the research effort in the last 10 years. The article describes the physics principle of cold-atom gravito-inertial sensors as well as the main parts of hardware and the expertise required when starting the design of such sensors. It then reviews the progress in the development of instruments measuring gravitational and inertial signals, with a highlight on the limitations to the performances of the sensors, on their applications, and on the latest directions of research.

show abstract

Section: Instruments Targeting High Stability Levels With Long Interrogation Timessupporting

confidence: 87%

High-accuracy inertial measurements with cold-atom sensors

Geiger

Landragin

Merlet

et al. 2020

AVS Quantum Science

152

View full text Add to dashboard Cite

show abstract

“…[7] for a total interrogation time 2T 50 ms (this method was later used in Ref. [8] where 2T = 104 ms). However, the residual systematic shift was not evaluated in this study.…”

Section: Introductionmentioning

confidence: 99%

Accurate trajectory alignment in cold-atom interferometers with separated laser beams

et al. 2020

View full text Add to dashboard Cite

Cold-atom interferometers commonly face systematic effects originating from the coupling between the trajectory of the atomic wave packet and the wave front of the laser beams driving the interferometer. Detrimental for the accuracy and the stability of such inertial sensors, these systematics are particularly enhanced in architectures based on spatially separated laser beams. Here we analyze the effect of a coupling between the relative alignment of two separated laser beams and the trajectory of the atomic wave packet in a four-light-pulse cold-atom gyroscope operated in fountain configuration. We present a method to align the two laser beams at the 0.2 µrad level and to determine the optimal mean velocity of the atomic wave packet with an accuracy of 0.2 mm · s −1 . Such fine tuning constrains the associated gyroscope bias to a level of 1 × 10 −10 rad · s −1 . In addition, we reveal this coupling using the point-source interferometry technique by analyzing single-shot time-of-flight fluorescence traces, which allows us to measure large angular misalignments between the interrogation beams. The alignment method which we present here can be employed in other sensor configurations and is particularly relevant to emerging gravitational wave detector concepts based on cold-atom interferometry.

show abstract

“…Multiple coldatom sources or a four-pulse Raman geometry are often used to distinguish between interferometer phase shifts induced by rotation and by acceleration. The approach with multiple cold-atom sources has been demonstrated with counter-propagating atomic beams [8,[23][24][25] and cold-atom clouds [9,[26][27][28][29][30][31] using the most common beamsplitter-mirror-beamsplitter Raman pulse sequence [32]. Since the rotational phase shifts depend on the atom velocity while the acceleration phase shifts do not, the rotation and acceleration measurements are constructed from linear combinations of the signals from the counter-propagating cold atom sources.…”

Section: Introductionmentioning

confidence: 99%

Single-Source Multiaxis Cold-Atom Interferometer in a Centimeter-Scale Cell

et al. 2019

View full text Add to dashboard Cite

Using the technique of point source atom interferometry (PSI), we characterize the sensitivity of a multi-axis gyroscope based on free-space Raman interrogation of a single source of cold atoms in a glass vacuum cell. The instrument simultaneously measures the acceleration in the direction of the Raman laser beams and the projection of the rotation vector onto the plane perpendicular to that direction. The sensitivities for the magnitude and direction of the rotation vector measurement are 0.033 • /s and 0.27 • with one second averaging time, respectively. The fractional acceleration sensitivity δg/g is 1.6 × 10 −5 / √ Hz. The sensitivity could be improved by increasing the Raman interrogation time, allowing the cold-atom cloud to expand further, correcting the fluctuations in the initial cloud shape, and reducing sources of technical noise. The PSI technique resolves a rotation vector in a plane by measuring a phase gradient. This two-dimensional rotation sensitivity may be specifically important for applications such as tracking the precession of a rotation vector and gyrocompassing.

show abstract

Calibration of atomic trajectories in a large-area dual-atom-interferometer gyroscope

Cited by 26 publications

References 27 publications

High-accuracy inertial measurements with cold-atom sensors

High-accuracy inertial measurements with cold-atom sensors

Accurate trajectory alignment in cold-atom interferometers with separated laser beams

Single-Source Multiaxis Cold-Atom Interferometer in a Centimeter-Scale Cell

Contact Info

Product

Resources

About