Dual-axis, high data-rate atom interferometer via cold ensemble exchange

Rakholia, Akash; McGuinness, Hayden; Biedermann, Grant

doi:10.48550/arxiv.1407.3847

Cited by 2 publications

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“…Nevertheless, the main limitation on increasing the sensitivity of time-domain interferometers in both applications (inertial navigation and geophysics) comes from aliasing of high-frequency noise due to measurement dead times. One solution consists of increasing the measurement repetition rate [33] but at the cost of a reduction of the interrogation time and, consequently, the sensitivity. A second method could consist of hybridizing a conventional optical gyroscope with the atom interferometer in order to benefit from the large bandwidth of the former, and the long-term stability and accuracy of the latter.…”

Section: Discussionmentioning

confidence: 99%

The Sagnac effect: 20 years of development in matter-wave interferometry

Barrett¹,

Geiger²,

Dutta³

et al. 2014

Comptes Rendus. Physique

131

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Since the first atom interferometry experiments in 1991, measurements of rotation through the Sagnac effect in open-area atom interferometers has been studied. These studies have demonstrated very high sensitivity which can compete with state-of-the-art optical Sagnac interferometers. Since the early 2000s, these developments have been motivated by possible applications in inertial guidance and geophysics. Most matter-wave interferometers that have been investigated since then are based on two-photon Raman transitions for the manipulation of atomic wave packets. Results from the two most studied configurations, a space-domain interferometer with atomic beams and a time-domain interferometer with cold atoms, are presented and compared. Finally, the latest generation of cold atom interferometers and their preliminary results are presented.

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Section: Discussionmentioning

confidence: 99%

The Sagnac effect: 20 years of development in matter-wave interferometry

Barrett¹,

Geiger²,

Dutta³

et al. 2014

Comptes Rendus. Physique

131

View full text Add to dashboard Cite

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“…The study of robust read out techniques performed in this paper will be of particular interest for gyroscopes that are envisaged for, e.g., navigational applications, such the gyroscope recently presented in [32], reaching repetition rates of 100 Hz. The modulation technique presented in our work could also be implemented in such interferometers of high repetition rate, both for modulation of the rotation and acceleration part, when choosing an appropriate mirror mounting in order to distinguish between both moments of inertia.…”

Section: Discussionmentioning

confidence: 99%

Large-area Sagnac atom interferometer with robust phase read out

Tackmann

Berg

Abend

et al. 2014

Comptes Rendus. Physique

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Interféromètre atomique Gyromètres Capteurs inertiels Atomes froidsWe report on recent progress on our matter-wave Sagnac interferometer capable of resolving ultra-slow rotations below the μrad s −1 level with a 1-s measurement time and a repetition rate of 2 Hz. Two Raman interferometers are employed that are susceptible to rotation and acceleration. We demonstrate two read-out schemes exploiting the strict phase correlation of the dual interferometer, the first one locking the interferometer to the mid-fringe position, and the second relying on phase modulation combined with ellipse fitting. In both, the sensitivity to gravity acceleration is employed for controlling the differential interferometer phase without influencing the rotation signal. Furthermore, we discuss errors in the rotation signal arising from atom source instabilities combined with a residual misalignment of the three pulsed light gratings used for atomic diffraction. Monitoring the source position fluctuations allows us to suppress this spurious signal. We achieve stable operation with a sensitivity of 850 nrad s −1 Hz −1/2 for a 1-s measurement time, and 20 nrad s −1 after 4000 s of averaging.

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Dual-axis, high data-rate atom interferometer via cold ensemble exchange

Cited by 2 publications

References 0 publications

The Sagnac effect: 20 years of development in matter-wave interferometry

The Sagnac effect: 20 years of development in matter-wave interferometry

Large-area Sagnac atom interferometer with robust phase read out

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