A simple laser system for atom interferometry

Merlet, Sébastien; Volodimer, Laurent; Lours, M.; Santos, F. Pereira Dos

doi:10.1007/s00340-014-5890-2

Cited by 39 publications

(20 citation statements)

References 35 publications

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“…Two different optical systems are used in our experiment. A commercial bench based on frequency doubled telecom lasers [53] supplies the 2D and upper 3D-MOT while a homemade bench based on semi-conductor lasers, supplies the bottom 3D-MOT, the Raman and detection beams [54]. The Raman beams are simply generated out of the lasers used for laser cooling using a double pass AOM, such as displayed in figure 2.…”

Section: Methodsmentioning

confidence: 99%

Simultaneous accurate determination of both gravity and its vertical gradient

et al. 2019

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We present a method for the accurate measurements of both the gravity acceleration and its vertical gradient using a dual atom interferometer, in principle free from any uncertainty related to the absolute or relative positions of the two atomic samples. The method relies on the use of a dual lock technique, which stirs simultaneously the chirp rate applied to the frequency difference between the interferometer lasers to compensate the gravity acceleration, and the frequency jump applied to the lasers at the mid pulse of the interferometer to compensate for the gravity gradient. This allows in the end to determine the two inertial quantities of interest in terms of frequencies.

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Section: Methodsmentioning

confidence: 99%

Simultaneous accurate determination of both gravity and its vertical gradient

et al. 2019

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“…The laser system we use for cooling, detecting and driving the interferometer pulses is based on semiconductor laser sources, and is described in detail in [36]. For the Bloch elevator, we generate a lattice laser using frequency doubling techniques (see figure 2).…”

Section: Principle Of the Experimentsmentioning

confidence: 99%

Differential phase extraction in dual interferometers exploiting the correlation between classical and quantum sensors

et al. 2017

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International audienceWe perform the experimental demonstration of the method proposed in [Phys. Rev. A 91, 063615 (2015)] to extract the differential phase in dual atom interferometers. From a single magneto-optical trap, we generate two atomic sources, vertically separated and free-falling synchronously, with the help of an accelerated lattice. We drive simultaneous Raman interferometers onto the two sources, and use the correlation with the vibration signal measured by a seismometer to extract the phase of each interferometer. We demonstrate an optimal sensitivity of the extracted differential phase between the two interferometers, free from vibration noise and limited by detection noise, when the two interferometers are in phase

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“…The sensor head of the gravimeter is described in [31]. The laser system, which is realized using two extended cavity laser diodes, and a typical measurement sequence are detailed in [32]. In this compact experimental setup, atoms are loaded directly from a background 87 Rb vapor, trapped in a three-dimensional magneto-optical trap (MOT), and further cooled down to 2 µK before being dropped in free fall by switching off the cooling lasers.…”

Section: Description Of the Experimentsmentioning

confidence: 99%

Active Control of Laser Wavefronts in Atom Interferometers

et al. 2017

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Wavefront aberrations are identified as a major limitation in quantum sensors. They are today the main contribution in the uncertainty budget of best cold atom interferometers based on two-photon laser beam splitters, and constitute an important limit for their long-term stability, impeding these instruments from reaching their full potential. Moreover, they will also remain a major obstacle in future experiments based on large momentum beam splitters. In this article, we tackle this issue by using a deformable mirror to control actively the laser wavefronts in atom interferometry. In particular, we demonstrate in an experimental proof of principle the efficient correction of wavefront aberrations in an atomic gravimeter

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A simple laser system for atom interferometry

Cited by 39 publications

References 35 publications

Simultaneous accurate determination of both gravity and its vertical gradient

Simultaneous accurate determination of both gravity and its vertical gradient

Differential phase extraction in dual interferometers exploiting the correlation between classical and quantum sensors

Active Control of Laser Wavefronts in Atom Interferometers

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