Rotation sensing with improved stability using point-source atom interferometry

Avinadav, Chen; Yankelev, Dimitry; Shuker, Moshe; Firstenberg, Ofer; Davidson, Nir

doi:10.1103/physreva.102.013326

Cited by 23 publications

(13 citation statements)

References 39 publications

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“…In Ref. 138 , the authors show how using additional information on the contrast and cloud size from the PSI images allows to determine the scale factor correction in each image, thereby enabling to suppress scale factor drifts by a factor 10 without degrading the short term sensitivity.…”

Section: Example Of Gyroscope Simplification Effortmentioning

confidence: 99%

High-accuracy inertial measurements with cold-atom sensors

Geiger

Landragin

Merlet

et al. 2020

AVS Quantum Science

154

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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.

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Section: Example Of Gyroscope Simplification Effortmentioning

confidence: 99%

High-accuracy inertial measurements with cold-atom sensors

Geiger

Landragin

Merlet

et al. 2020

AVS Quantum Science

154

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“…The cold-atom beam interferometer architecture demonstrated here is amenable to the use of a number of advanced or novel atom interferometry techniques. These include rapid atomic velocity switching for high-dynamic-range compositefringe operation [37], actuation of Raman beam alignment to compensate for platform rotation [29], rapid k-reversal for cancellation of systematic error with high bandwidth, and continuous spatially resolved point-source interferometry for multidimensional rotation sensitivity [11,38]. Here we provide an example of one such technique, phase shear interferometry, implemented in the continuous cold-atom beam.…”

Section: Phase-shear Measurementmentioning

confidence: 99%

“…In light-pulse atom interferometers [1-4], coherent interaction with optical fields causes atoms to propagate in a superposition of spacetime trajectories that interfere at the output of the interferometer. Applications of light-pulse atom interferometry to measurement of acceleration [5][6][7], rotation rate [8][9][10][11], gravity [12][13][14], and gravity gradients [15,16] have been demonstrated on numerous occasions, and future applications such as gravitational wave detection [17][18][19][20] are under development.…”

Section: Introductionmentioning

confidence: 99%

A continuous, sub-Doppler-cooled atomic beam interferometer for inertial sensing

Kwolek,

Black

2021

Preprint

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We present the first demonstration of an inertially sensitive atomic interferometer based on a continuous, rather than pulsed, atomic beam at sub-Doppler temperatures in three dimensions. We demonstrate 30% fringe contrast in continuous, inertially sensitive interference fringes at interrogation time T = 6.7 ms and a short-term phase measurement noise of 530 µrad/ √ Hz as inferred from interference measurements. Atoms are delivered to the interferometer by a cold-rubidium source that produces a high flux of atoms at temperature ≤ 15 µK in three dimensions while reducing near-resonance fluorescence in the downstream path of the atoms. We describe the optimization of the interrogating Raman beams to achieve high contrast, and validate interferometer operation through comparison with measurements by commercial accelerometers. We further provide a demonstration of zero-dead-time phase-shear readout of atom interferometer phase, achieving a measurement rate up to 160 Hz. This demonstration lays the groundwork for future gyroscope/accelerometer sensors that measure continuously, with both high bandwidth and high sensitivity, and on dynamic platforms.

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“…To obtain the phase, in a manner equivalent to full quadrature detection where both sine and cosine components of the phase are measured, we use phase-shear readout [26]. We tilt the retro-reflecting Raman mirror by a small angle before the final π/2-pulses to generate a spatial transverse interference pattern across the cloud, as utilized in point-source interferometry [27][28][29] and shown in Fig. 1(c).…”

Section: Principles Of Dual-t Interferometrymentioning

confidence: 99%

“…These hypothe-ses are weighted through Bayesian estimation after every measurement, converging on a solution that is consistent with the sensor readings over time. In our context, under some model assumptions on the signal dynamics, use of particle filter enables full recovery of the single-shot bandwidth [29] while maintaining the large increase in dynamic range rendered by the sequential operation. An experimental realization of tracking a dynamic signal is presented in Fig.…”

Section: Tracking Fast-varying Signalsmentioning

confidence: 99%

Atom interferometry with thousand-fold increase in dynamic range

Yankelev,

Avinadav,

Davidson

et al. 2020

Preprint

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The periodicity inherent to any interferometric signal entails a fundamental trade-off between sensitivity and dynamic range of interferometry-based sensors. Here we develop a methodology for significantly extending the dynamic range of such sensors without compromising their sensitivity, scale-factor, and bandwidth. The scheme is based on operating two simultaneous, nearly-overlapping interferometers, with full-quadrature phase detection and with different but close scale factors. The two interferometers provide a joint period much larger than 2π in a moiré-like effect, while benefiting from close-to-maximal sensitivity and from suppression of common-mode noise. The methodology is highly suited to atom interferometers, which offer record sensitivities in measuring gravito-inertial forces but suffer from limited dynamic range. We experimentally demonstrate an atom interferometer with a dynamic-range enhancement of over an order of magnitude in a single shot and over three orders of magnitude within a few shots, for both static and dynamic signals. This approach can dramatically improve the operation of interferometric sensors in challenging, uncertain, or rapidly varying, conditions.

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Rotation sensing with improved stability using point-source atom interferometry

Cited by 23 publications

References 39 publications

High-accuracy inertial measurements with cold-atom sensors

High-accuracy inertial measurements with cold-atom sensors

A continuous, sub-Doppler-cooled atomic beam interferometer for inertial sensing

Atom interferometry with thousand-fold increase in dynamic range

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