Active Control of Laser Wavefronts in Atom Interferometers

Trimeche, Azer; Langlois, Mehdi; Merlet, Sébastien; Santos, F. Pereira Dos

doi:10.1103/physrevapplied.7.034016

Cited by 36 publications

(29 citation statements)

References 41 publications

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“…Wavefront aberration is one of the leading systematic errors in light pulse atom interferometers [48,49]. In PSI this systematic is expected to be larger because (a) the cloud necessarily expands and therefore samples more of the Raman beam transverse profile and (b) because higher-order antisymmetric wavefront distortions will cause a phase gradient across the cloud and a corresponding systematic in rotation.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2019

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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.

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Section: Discussionmentioning

confidence: 99%

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

et al. 2019

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“…The optical characteristics of the reflector are critical for the performance of the instrument, both in terms of polarization and wavefront aberrations 32 . The inner faces of the reflector are coated for maximum reflection at 45° and for equal phase-shift between the two orthogonal polarizations.…”

Section: The Absolute Quantum Gravimetermentioning

confidence: 99%

Gravity measurements below 10−9 g with a transportable absolute quantum gravimeter

Ménoret¹,

Vermeulen²,

Moigne

et al. 2018

Sci Rep

306

222

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Gravimetry is a well-established technique for the determination of sub-surface mass distribution needed in several fields of geoscience, and various types of gravimeters have been developed over the last 50 years. Among them, quantum gravimeters based on atom interferometry have shown top-level performance in terms of sensitivity, long-term stability and accuracy. Nevertheless, they have remained confined to laboratories due to their complex operation and high sensitivity to the external environment. Here we report on a novel, transportable, quantum gravimeter that can be operated under real world conditions by non-specialists, and measure the absolute gravitational acceleration continuously with a long-term stability below 10 nm.s−2 (1 μGal). It features several technological innovations that allow for high-precision gravity measurements, while keeping the instrument light and small enough for field measurements. The instrument was characterized in detail and its stability was evaluated during a month-long measurement campaign.

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“…3c), leading to large-momentum beamsplitters 67,68 , where a large number, N, of photon momenta are transferred, leading to an N-fold increase in sensitivity. Whereas beamsplitters with hundreds of photon recoils have been demonstrated, real sensitivity improvements have only been observed 69,70 for photon exchanges of N ≈ 30, because technical challenges (such as wavefront curvature [70][71][72][73][74] and nonzero excitation probabilities) still limit the achievable interferometer contrast. Further advances are promised by atom-number squeezing 74 and quantum non-demolition measurements 75 , which increase the signal-to-noise ratio in the interferometer readout.…”

Section: Increasing the Measurement Precisionmentioning

confidence: 99%

Taking atom interferometric quantum sensors from the laboratory to real-world applications

et al. 2019

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Since the first proof-of-principle experiments over 25 years ago, atom interferometry has matured to a versatile tool that can be used in fundamental research in particle physics, general relativity and cosmology. At the same time, atom interferometers are currently moving out of the laboratory to be used as ultraprecise quantum sensors in metrology , geophysics, space, civil engineering, oil and minerals exploration, and navigation. This Perspective discusses the associated scientific and technological challenges and highlights recent advances.

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Active Control of Laser Wavefronts in Atom Interferometers

Cited by 36 publications

References 41 publications

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

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

Gravity measurements below 10−9 g with a transportable absolute quantum gravimeter

Taking atom interferometric quantum sensors from the laboratory to real-world applications

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